diff --git a/client/src/components/AlgorithmRunPanel.tsx b/client/src/components/AlgorithmRunPanel.tsx
index 68c0bc7..b5edea6 100644
--- a/client/src/components/AlgorithmRunPanel.tsx
+++ b/client/src/components/AlgorithmRunPanel.tsx
@@ -11,9 +11,10 @@
  */
 import { useEffect, useState } from 'react';
 import { trpc } from '@/lib/trpc';
-import { AlertTriangle, CheckCircle2, ChevronDown, ChevronRight, Cpu, Play, RefreshCw, Scan, Square } from 'lucide-react';
+import { AlertTriangle, CheckCircle2, ChevronDown, ChevronRight, Cpu, ListChecks, Play, RefreshCw, Scan, Square } from 'lucide-react';
 import { toast } from 'sonner';
 import TrainMeasurementPanel from './TrainMeasurementPanel';
+import DemoTaskSelectionDialog from './DemoTaskSelectionDialog';
 
 const DEMO_MEASUREMENT_PLUGIN_IDS = [
   'train-measurement',
@@ -130,6 +131,19 @@ export default function AlgorithmRunPanel({ taskId, modelId, pointCloudLoaded: _
     },
     onError: (e) => toast.error(e.message || '一键全流程演示提交失败'),
   });
+  const runDemoSelected = trpc.algorithm.runDemoSelected.useMutation({
+    onSuccess: ({ registrationJob, queuedMeasurementCount, selectedTaskNos }) => {
+      if (registrationJob) {
+        toast.success(`已提交自选 ${selectedTaskNos.length} 项；配准完成后将自动提交 ${queuedMeasurementCount} 个测量算法`);
+      }
+      if (taskId != null) {
+        void utils.analysisResult.list.invalidate({ taskId });
+        void utils.pointcloudFile.list.invalidate({ taskId });
+      }
+      if (modelId != null) void utils.inspectionTask.listByModel.invalidate({ modelId });
+    },
+    onError: (e) => toast.error(e.message || '选择任务运行提交失败'),
+  });
   const cancelDemoAll = trpc.algorithm.cancelDemoAll.useMutation({
     onSuccess: ({ cancelledIds }) => {
       toast.success(cancelledIds.length > 0 ? `已停止 ${cancelledIds.length} 个运行任务` : '当前没有运行中的全流程任务');
@@ -151,10 +165,15 @@ export default function AlgorithmRunPanel({ taskId, modelId, pointCloudLoaded: _
     { taskId: taskId ?? 0 },
     { enabled: taskId != null, refetchInterval: 3000 },
   );
+  const { data: demoTaskCatalog, isLoading: demoCatalogLoading } = trpc.algorithm.demoTaskCatalog.useQuery(
+    { taskId: taskId ?? 0 },
+    { enabled: taskId != null, staleTime: 60_000 },
+  );
 
   const [selected, setSelected] = useState<Set<string>>(new Set());
   const [expanded, setExpanded] = useState<Set<string>>(new Set());
   const [paramsById, setParamsById] = useState<Record<string, Record<string, unknown>>>({});
+  const [demoTaskDialogOpen, setDemoTaskDialogOpen] = useState(false);
 
   // 首次拉到 plugins 后用默认值初始化每个表单
   useEffect(() => {
@@ -202,13 +221,13 @@ export default function AlgorithmRunPanel({ taskId, modelId, pointCloudLoaded: _
     ...(hasDemoRegistrationPlugin ? ['vehicle-registration'] : []),
     ...demoMeasurementPluginIds,
   ];
-  const demoAlgorithmCount = demoAllPluginIds.length;
   const demoMeasurementAlgorithmCount = demoMeasurementPluginIds.length;
+  const demoTaskCount = demoTaskCatalog?.total ?? 0;
   const demoRunTitle = `先执行整车配准，完成后自动提交 ${demoMeasurementAlgorithmCount} 个测量算法`;
   const demoPluginIds = new Set(demoAllPluginIds);
   const runningDemoResults = analysisResults.filter((r) => (r.status === 'processing' || r.status === 'pending') && r.type === 'plugin' && r.pluginId && demoPluginIds.has(r.pluginId));
   const demoFlowRunning = runningDemoResults.length > 0;
-  const demoFlowActive = demoFlowRunning || runDemoAll.isPending;
+  const demoFlowActive = demoFlowRunning || runDemoAll.isPending || runDemoSelected.isPending;
 
   const selectedPcCount = selectedPcFileIds?.length ?? 0;
   const selectedCadCount = selectedCadFileIds?.length ?? 0;
@@ -232,7 +251,7 @@ export default function AlgorithmRunPanel({ taskId, modelId, pointCloudLoaded: _
     taskId == null ? '请先选择检测任务'
     : (taskPcFileCount ?? 0) === 0 ? '请先上传点云文件'
     : demoFlowRunning ? '一键全流程运行中，请先停止或等待完成'
-    : (runBatch.isPending || runDemoAll.isPending || cancelDemoAll.isPending) ? '算法提交中，请稍候'
+    : (runBatch.isPending || runDemoAll.isPending || runDemoSelected.isPending || cancelDemoAll.isPending) ? '算法提交中，请稍候'
     : null;
   const registrationBlockReason =
     baseRunBlockReason
@@ -257,6 +276,8 @@ export default function AlgorithmRunPanel({ taskId, modelId, pointCloudLoaded: _
       : selectedCadCount > 1 ? '一键全流程演示一次只能选择 1 个 CAD 文件'
       : !hasDemoRegistrationPlugin ? '暂无可执行的整车配准算法'
       : demoMeasurementPluginIds.length === 0 ? '暂无可执行的测量算法'
+      : demoCatalogLoading ? '正在加载任务目录'
+      : demoTaskCount === 0 ? '当前检测对象暂无可运行任务'
       : null);
   const canRunDemoAll = demoBlockReason == null;
   const demoRouteHint =
@@ -337,6 +358,20 @@ export default function AlgorithmRunPanel({ taskId, modelId, pointCloudLoaded: _
     });
   };
 
+  const handleRunDemoSelected = (taskNos: number[]) => {
+    if (demoBlockReason) {
+      toast.error(demoBlockReason);
+      return;
+    }
+    if (taskId == null || !selectedPcFileIds?.[0] || !selectedCadFileIds?.[0]) return;
+    runDemoSelected.mutate({
+      taskId,
+      sourcePointCloudFileId: selectedPcFileIds[0],
+      cadFileId: selectedCadFileIds[0],
+      taskNos,
+    });
+  };
+
   const handleCancelDemoAll = () => {
     if (taskId == null || cancelDemoAll.isPending) return;
     cancelDemoAll.mutate({ taskId });
@@ -353,7 +388,7 @@ export default function AlgorithmRunPanel({ taskId, modelId, pointCloudLoaded: _
             <Cpu className="w-3.5 h-3.5" />
             一键全流程演示
           </span>
-          <div className="flex items-center gap-1">
+          <div className="flex flex-wrap items-center justify-end gap-1">
             {demoFlowRunning && (
               <span className="text-[9px] px-1.5 py-0.5 rounded bg-blue-900/40 text-blue-300 animate-pulse">
                 运行中 {runningDemoResults.length}
@@ -373,18 +408,32 @@ export default function AlgorithmRunPanel({ taskId, modelId, pointCloudLoaded: _
                 停止全流程
               </button>
             ) : (
-              <button
-                type="button"
-                className={`industrial-btn industrial-btn-primary py-0.5 text-[10px] flex items-center gap-0.5 ${
-                  canRunDemoAll ? '' : 'opacity-50 cursor-not-allowed'
-                }`}
-                disabled={!canRunDemoAll}
-                onClick={handleRunDemoAll}
-                title={demoBlockReason ?? demoRunTitle}
-              >
-                {runDemoAll.isPending ? <RefreshCw className="w-3 h-3 animate-spin" /> : <Play className="w-3 h-3" />}
-                运行全部 {demoAlgorithmCount} 个算法
-              </button>
+              <>
+                <button
+                  type="button"
+                  className={`industrial-btn industrial-btn-primary py-0.5 text-[10px] flex items-center gap-0.5 ${
+                    canRunDemoAll ? '' : 'opacity-50 cursor-not-allowed'
+                  }`}
+                  disabled={!canRunDemoAll}
+                  onClick={handleRunDemoAll}
+                  title={demoBlockReason ?? demoRunTitle}
+                >
+                  {runDemoAll.isPending ? <RefreshCw className="w-3 h-3 animate-spin" /> : <Play className="w-3 h-3" />}
+                  运行全部任务（{demoTaskCount}项）
+                </button>
+                <button
+                  type="button"
+                  className={`industrial-btn py-0.5 text-[10px] flex items-center gap-0.5 ${
+                    taskId != null && !demoCatalogLoading && demoTaskCount > 0 ? '' : 'opacity-50 cursor-not-allowed'
+                  }`}
+                  disabled={taskId == null || demoCatalogLoading || demoTaskCount === 0}
+                  onClick={() => setDemoTaskDialogOpen(true)}
+                  title="选择正式任务并运行最小测量算法集合"
+                >
+                  <ListChecks className="w-3 h-3" />
+                  选择任务运行
+                </button>
+              </>
             )}
           </div>
         </div>
@@ -523,6 +572,17 @@ export default function AlgorithmRunPanel({ taskId, modelId, pointCloudLoaded: _
           />
         ))}
       </div>
+
+      <DemoTaskSelectionDialog
+        open={demoTaskDialogOpen}
+        onOpenChange={setDemoTaskDialogOpen}
+        items={demoTaskCatalog?.items ?? []}
+        total={demoTaskCount}
+        loading={demoCatalogLoading}
+        pending={runDemoSelected.isPending}
+        runBlockReason={demoBlockReason}
+        onRun={handleRunDemoSelected}
+      />
     </div>
   );
 }
diff --git a/client/src/components/AnalysisPanel.tsx b/client/src/components/AnalysisPanel.tsx
index bdac908..d908ae3 100644
--- a/client/src/components/AnalysisPanel.tsx
+++ b/client/src/components/AnalysisPanel.tsx
@@ -263,6 +263,9 @@ type DemoFlowMeta = {
   role?: string;
   index?: number;
   total?: number;
+  mode?: 'all' | 'selected';
+  selectedTaskNos?: number[];
+  selectedTaskCount?: number;
 };
 
 const SHOW_LEGACY_ANALYSIS_ACTIONS = false;
@@ -293,6 +296,11 @@ function readDemoFlowMeta(result: AnalysisResultRow): DemoFlowMeta | null {
     role: typeof data.demoFlowRole === 'string' ? data.demoFlowRole : undefined,
     index: numberFromUnknown(data.demoFlowIndex),
     total: numberFromUnknown(data.demoFlowTotal),
+    mode: data.demoFlowMode === 'selected' ? 'selected' : data.demoFlowMode === 'all' ? 'all' : undefined,
+    selectedTaskNos: Array.isArray(data.demoFlowSelectedTaskNos)
+      ? data.demoFlowSelectedTaskNos.filter((value): value is number => typeof value === 'number' && Number.isInteger(value))
+      : undefined,
+    selectedTaskCount: numberFromUnknown(data.demoFlowSelectedTaskCount),
   };
 }
 
@@ -886,10 +894,16 @@ export default function AnalysisPanel({ taskId, onReplay, onViewSmoothHeatmap, o
     const cardKey = `${variant}:${group.runId}`;
     const resultsExpanded = !collapsedFlowResultCards.has(cardKey);
     const artifactsExpanded = expandedFlowArtifactCards.has(cardKey);
+    const flowMeta = group.results.map(readDemoFlowMeta).find((meta) => meta?.mode) ?? null;
+    const selectedTaskNos = flowMeta?.mode === 'selected' ? flowMeta.selectedTaskNos : undefined;
+    const selectedTaskCount = flowMeta?.selectedTaskCount ?? selectedTaskNos?.length ?? 0;
+    const flowTitle = flowMeta?.mode === 'selected'
+      ? `全流程算法结果 · 自选 ${selectedTaskCount} 项`
+      : '全流程算法结果 · 全部任务';
     const aggregated = aggregateDemoFlowResults(
       group.results,
       (result) => getPluginDisplayName(result.pluginId, pluginNameById, getResultTitle(result, pluginNameById)),
-      { includeAlgorithmGroups: SHOW_DEMO_FLOW_ALGORITHM_GROUP_ROWS },
+      { includeAlgorithmGroups: SHOW_DEMO_FLOW_ALGORITHM_GROUP_ROWS, selectedTaskNos },
     );
     const sortedTableRows = SHOW_DEMO_FLOW_ALGORITHM_GROUP_ROWS
       ? aggregated.tableRows
@@ -908,7 +922,7 @@ export default function AnalysisPanel({ taskId, onReplay, onViewSmoothHeatmap, o
         >
           {expanded ? <ChevronDown className="w-3 h-3 text-muted-foreground" /> : <ChevronRight className="w-3 h-3 text-muted-foreground" />}
           <Layers className="w-3.5 h-3.5 text-cyan-400 flex-shrink-0" />
-          <span className="text-xs flex-1 min-w-0 truncate">全流程算法结果</span>
+          <span className="text-xs flex-1 min-w-0 truncate">{flowTitle}</span>
           <span className="text-[10px] text-muted-foreground flex-shrink-0">
             {completed}/{total} 完成
           </span>
diff --git a/client/src/components/DemoTaskSelectionDialog.tsx b/client/src/components/DemoTaskSelectionDialog.tsx
new file mode 100644
index 0000000..b512aa5
--- /dev/null
+++ b/client/src/components/DemoTaskSelectionDialog.tsx
@@ -0,0 +1,219 @@
+import { useEffect, useMemo, useState } from 'react';
+import { Layers, Play, Search, XCircle } from 'lucide-react';
+import { Button } from './ui/button';
+import { Checkbox } from './ui/checkbox';
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from './ui/dialog';
+import { Input } from './ui/input';
+
+export interface DemoTaskCatalogItem {
+  taskNo: number;
+  name: string;
+  category: string;
+  pluginId: string;
+  pluginName: string;
+  enabled: boolean;
+  disabledReason?: string;
+}
+
+interface Props {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  items: DemoTaskCatalogItem[];
+  total: number;
+  loading: boolean;
+  pending: boolean;
+  runBlockReason: string | null;
+  onRun: (taskNos: number[]) => void;
+}
+
+export default function DemoTaskSelectionDialog({
+  open,
+  onOpenChange,
+  items,
+  total,
+  loading,
+  pending,
+  runBlockReason,
+  onRun,
+}: Props) {
+  const [search, setSearch] = useState('');
+  const [selected, setSelected] = useState<Set<number>>(new Set());
+
+  useEffect(() => {
+    if (!open) return;
+    setSearch('');
+    setSelected(new Set());
+  }, [open]);
+
+  const filteredItems = useMemo(() => {
+    const keyword = search.trim().toLocaleLowerCase('zh-CN');
+    if (!keyword) return items;
+    return items.filter((item) => (
+      String(item.taskNo).includes(keyword)
+      || `任务${String(item.taskNo).padStart(2, '0')}`.toLocaleLowerCase('zh-CN').includes(keyword)
+      || item.name.toLocaleLowerCase('zh-CN').includes(keyword)
+    ));
+  }, [items, search]);
+  const selectableResults = filteredItems.filter((item) => item.enabled);
+  const selectedCountInResults = selectableResults.filter((item) => selected.has(item.taskNo)).length;
+  const selectAllState = selectableResults.length > 0 && selectedCountInResults === selectableResults.length
+    ? true
+    : selectedCountInResults > 0
+      ? 'indeterminate'
+      : false;
+  const selectedPluginCount = new Set(
+    items.filter((item) => selected.has(item.taskNo)).map((item) => item.pluginId),
+  ).size;
+  const startBlockReason = selected.size === 0 ? '请至少选择一个任务' : runBlockReason;
+
+  const toggleTask = (taskNo: number) => {
+    setSelected((previous) => {
+      const next = new Set(previous);
+      if (next.has(taskNo)) next.delete(taskNo);
+      else next.add(taskNo);
+      return next;
+    });
+  };
+
+  const toggleAllResults = () => {
+    setSelected((previous) => {
+      const next = new Set(previous);
+      if (selectAllState === true) {
+        selectableResults.forEach((item) => next.delete(item.taskNo));
+      } else {
+        selectableResults.forEach((item) => next.add(item.taskNo));
+      }
+      return next;
+    });
+  };
+
+  const handleRun = () => {
+    if (startBlockReason) return;
+    onRun(Array.from(selected).sort((a, b) => a - b));
+    onOpenChange(false);
+  };
+
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent className="max-h-[88vh] w-[min(960px,calc(100vw-1rem))] max-w-none grid-rows-[auto_minmax(0,1fr)_auto] gap-0 overflow-hidden p-0 sm:max-w-none">
+        <DialogHeader className="border-b border-border/60 px-4 py-4 pr-12 sm:px-6">
+          <DialogTitle className="flex items-center gap-2 text-base sm:text-lg">
+            <Layers className="size-4 text-cyan-400" />
+            选择任务运行
+          </DialogTitle>
+          <DialogDescription>
+            当前检测对象可运行 {total} 项；系统仍会先执行 1 次整车配准。
+          </DialogDescription>
+          <div className="relative pt-2">
+            <Search className="pointer-events-none absolute left-3 top-[18px] size-4 text-muted-foreground" />
+            <Input
+              autoFocus
+              value={search}
+              onChange={(event) => setSearch(event.target.value)}
+              placeholder="搜索任务号或任务名称"
+              aria-label="搜索任务号或任务名称"
+              className="pl-9"
+            />
+          </div>
+          <div className="flex min-h-8 flex-wrap items-center gap-3 pt-1 text-xs">
+            <label className="flex cursor-pointer items-center gap-2 rounded px-1 py-1 focus-within:ring-2 focus-within:ring-ring">
+              <Checkbox
+                checked={selectAllState}
+                onCheckedChange={toggleAllResults}
+                disabled={selectableResults.length === 0}
+                aria-label="全选当前搜索结果"
+              />
+              全选当前结果（{selectableResults.length}）
+            </label>
+            <Button
+              type="button"
+              variant="ghost"
+              size="sm"
+              className="h-7 px-2 text-xs"
+              onClick={() => setSelected(new Set())}
+              disabled={selected.size === 0}
+            >
+              <XCircle className="size-3.5" /> 清空
+            </Button>
+          </div>
+        </DialogHeader>
+
+        <div className="min-h-0 overflow-y-auto px-3 py-3 sm:px-6 sm:py-4">
+          {loading ? (
+            <div className="py-12 text-center text-sm text-muted-foreground">正在加载任务目录…</div>
+          ) : filteredItems.length === 0 ? (
+            <div className="py-12 text-center text-sm text-muted-foreground">没有匹配的任务</div>
+          ) : (
+            <div className="grid grid-cols-1 gap-2 md:grid-cols-2" role="group" aria-label="可选任务">
+              {filteredItems.map((item) => {
+                const checkboxId = `demo-task-${item.taskNo}`;
+                return (
+                  <label
+                    key={item.taskNo}
+                    htmlFor={checkboxId}
+                    className={`flex min-h-14 items-start gap-3 rounded-md border px-3 py-2.5 transition-colors motion-reduce:transition-none ${
+                      item.enabled
+                        ? selected.has(item.taskNo)
+                          ? 'cursor-pointer border-primary/70 bg-primary/10 hover:bg-primary/15'
+                          : 'cursor-pointer border-border/70 hover:border-primary/40 hover:bg-secondary/50'
+                        : 'cursor-not-allowed border-border/40 bg-muted/20 opacity-55'
+                    }`}
+                    title={item.disabledReason}
+                  >
+                    <Checkbox
+                      id={checkboxId}
+                      checked={selected.has(item.taskNo)}
+                      disabled={!item.enabled}
+                      onCheckedChange={() => toggleTask(item.taskNo)}
+                      aria-describedby={!item.enabled ? `${checkboxId}-reason` : undefined}
+                      className="mt-0.5"
+                    />
+                    <span className="min-w-0 flex-1">
+                      <span className="flex items-center gap-2">
+                        <span className="rounded bg-cyan-950/70 px-1.5 py-0.5 font-mono text-[10px] font-medium text-cyan-300">
+                          任务 {String(item.taskNo).padStart(2, '0')}
+                        </span>
+                        <span className="rounded bg-secondary px-1.5 py-0.5 text-[9px] text-muted-foreground">
+                          {item.category}
+                        </span>
+                      </span>
+                      <span className="mt-1 block text-xs leading-5 text-foreground">{item.name}</span>
+                      {!item.enabled && item.disabledReason && (
+                        <span id={`${checkboxId}-reason`} className="mt-0.5 block text-[10px] text-amber-400">
+                          {item.disabledReason}
+                        </span>
+                      )}
+                    </span>
+                  </label>
+                );
+              })}
+            </div>
+          )}
+        </div>
+
+        <DialogFooter className="border-t border-border/60 bg-background/95 px-4 py-3 backdrop-blur sm:items-center sm:justify-between sm:px-6">
+          <div className="text-left" aria-live="polite" aria-atomic="true">
+            <div className="text-xs font-medium">
+              已选 {selected.size} 项 · 将执行 {selectedPluginCount} 个测量算法 + 1 次整车配准
+            </div>
+            {startBlockReason && <div className="mt-0.5 text-[10px] text-amber-400">{startBlockReason}</div>}
+          </div>
+          <div className="flex justify-end gap-2">
+            <Button type="button" variant="outline" size="sm" onClick={() => onOpenChange(false)}>取消</Button>
+            <Button type="button" size="sm" onClick={handleRun} disabled={Boolean(startBlockReason) || pending}>
+              <Play className="size-3.5" />
+              {pending ? '提交中…' : '开始运行'}
+            </Button>
+          </div>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}
diff --git a/client/src/components/demoFlowAggregation.test.ts b/client/src/components/demoFlowAggregation.test.ts
index a917416..2808dba 100644
--- a/client/src/components/demoFlowAggregation.test.ts
+++ b/client/src/components/demoFlowAggregation.test.ts
@@ -84,6 +84,23 @@ describe('aggregateDemoFlowResults', () => {
     ]);
   });
 
+  it('自选模式只聚合选中的正式任务，任务 5 保留左右梁两个位置', () => {
+    const results = [result(1, 1, 'completed', {
+      measurements: [
+        { taskNo: '2', name: '车体长度', value: 1 },
+        { taskNo: '5', name: '挠度', position: '左梁', value: 2 },
+        { taskNo: '5', name: '挠度', position: '右梁', value: 3 },
+        { taskNo: '10', name: '纵向中心右偏转', value: 4 },
+      ],
+    })];
+    const model = aggregateDemoFlowResults(results, () => '算法', { selectedTaskNos: [5, 10] });
+    expect(model.measurementRows.map((row) => [row.measurement.taskNo, row.measurement.position])).toEqual([
+      ['5', '左梁'],
+      ['5', '右梁'],
+      ['10', undefined],
+    ]);
+  });
+
   it('全流程结果使用统一结论文案，不采用算法自定义文案', () => {
     expect(demoFlowStatusLabel({ status: 'pass' })).toBe('合格');
     expect(demoFlowStatusLabel({ status: 'warning' })).toBe('警告');
diff --git a/client/src/components/demoFlowAggregation.ts b/client/src/components/demoFlowAggregation.ts
index 38fb0ad..df21e66 100644
--- a/client/src/components/demoFlowAggregation.ts
+++ b/client/src/components/demoFlowAggregation.ts
@@ -123,7 +123,7 @@ export function demoFlowStatusLabel(measurement: Pick<Measurement, 'status'>): s
 export function aggregateDemoFlowResults(
   results: DemoFlowSourceResult[],
   getAlgorithmName: (result: DemoFlowSourceResult) => string,
-  options: { includeAlgorithmGroups?: boolean } = {},
+  options: { includeAlgorithmGroups?: boolean; selectedTaskNos?: readonly number[] } = {},
 ): DemoFlowAggregation {
   const sorted = results
     .map((result, originalIndex) => ({ result, originalIndex, index: flowIndex(result, originalIndex + 1) }))
@@ -132,12 +132,18 @@ export function aggregateDemoFlowResults(
   const tableRows: DemoFlowTableRow[] = [];
   const artifactGroups: DemoFlowArtifactGroup[] = [];
   const statusNotices: DemoFlowStatusNotice[] = [];
+  const selectedTaskNos = options.selectedTaskNos
+    ? new Set(options.selectedTaskNos.map(String))
+    : null;
 
   for (const { result, index } of sorted) {
     const data = (asRecord(result.resultData) ?? {}) as PluginResultLike & Record<string, unknown>;
     const sourceAlgorithmId = result.pluginId ?? (typeof data.pluginId === 'string' ? data.pluginId : result.type);
     const algorithmName = getAlgorithmName(result);
-    const measurements = filterDemoFlowMeasurements(Array.isArray(data.measurements) ? data.measurements : []);
+    const measurements = filterDemoFlowMeasurements(Array.isArray(data.measurements) ? data.measurements : [])
+      .filter((measurement) => !selectedTaskNos || (
+        typeof measurement.taskNo === 'string' && selectedTaskNos.has(measurement.taskNo)
+      ));
 
     if (measurements.length > 0 && options.includeAlgorithmGroups) {
       tableRows.push({ kind: 'algorithm', sourceAlgorithmId, algorithmName, resultId: result.id, flowIndex: index });
diff --git a/server/algorithmJobRunner.ts b/server/algorithmJobRunner.ts
index d32fb3d..1e758e8 100644
--- a/server/algorithmJobRunner.ts
+++ b/server/algorithmJobRunner.ts
@@ -201,6 +201,10 @@ const DEMO_FLOW_RESULT_DATA_KEYS = [
   'demoFlowSourcePointCloudFileId',
   'demoFlowCadFileId',
   'demoFlowCancelledAt',
+  'demoFlowMode',
+  'demoFlowSelectedTaskNos',
+  'demoFlowSelectedTaskCount',
+  'demoFlowPluginTaskNos',
 ] as const;
 
 async function readDemoFlowResultData(resultId: number): Promise<Record<string, unknown>> {
@@ -389,8 +393,19 @@ export async function runAlgorithmJob(
       algorithmProtocolVersion: result?.schemaVersion ?? manifest.schemaVersion,
     });
     logCompatibilityWarnings(resultId, normalized.warnings);
+    const requestedDemoTaskNos = Array.isArray(params.demoTaskNos)
+      ? new Set(
+          params.demoTaskNos
+            .filter((value): value is number => typeof value === 'number' && Number.isInteger(value))
+            .map(String),
+        )
+      : null;
     const normalizedMeasurements = Array.isArray(result?.measurements)
-      ? normalized.measurements
+      ? requestedDemoTaskNos
+        ? normalized.measurements.filter((measurement) => (
+            typeof measurement.taskNo === 'string' && requestedDemoTaskNos.has(measurement.taskNo)
+          ))
+        : normalized.measurements
       : undefined;
     const resultData: PluginResultData = {
       kind: 'plugin',
diff --git a/server/demoFlow.test.ts b/server/demoFlow.test.ts
new file mode 100644
index 0000000..c19fe92
--- /dev/null
+++ b/server/demoFlow.test.ts
@@ -0,0 +1,84 @@
+import { describe, expect, it } from 'vitest';
+import { buildDemoTaskCatalog, resolveSelectedDemoJobs } from './demoFlow';
+import { listPlugins } from './plugins/registry';
+import type { PluginManifest } from './plugins/types';
+
+function manifest(id: string, tasks: PluginManifest['demoTasks']): PluginManifest {
+  return {
+    id,
+    name: id,
+    description: id,
+    version: '1',
+    schemaVersion: 1,
+    demoTasks: tasks,
+    demoSelection: { kind: 'task-nos', param: 'demoTaskNos' },
+    runtime: { kind: 'mock', fixture: 'unused.json' },
+  };
+}
+
+const manifests = [
+  manifest('distance', [
+    { taskNo: 2, name: '车体长度', category: '尺寸', inspectionObjects: ['head', 'middle'] },
+  ]),
+  manifest('contour', [
+    { taskNo: 11, name: '车钩面板的平整度', category: '轮廓', inspectionObjects: ['head', 'middle'] },
+  ]),
+  manifest('coupler', [
+    { taskNo: 9, name: '参考面右偏转', category: '车钩', inspectionObjects: ['middle'] },
+    { taskNo: 10, name: '纵向中心右偏转', category: '车钩', inspectionObjects: ['head'] },
+  ]),
+];
+
+describe('demo task catalog', () => {
+  it('按数值排序并标记不适用于当前检测对象的任务', () => {
+    const catalog = buildDemoTaskCatalog(manifests, 'head', '头车');
+    expect(catalog.items.map((item) => item.taskNo)).toEqual([2, 9, 10, 11]);
+    expect(catalog.total).toBe(3);
+    expect(catalog.items.find((item) => item.taskNo === 9)).toMatchObject({ enabled: false });
+  });
+
+  it('跨算法选择转换为最小作业集合并去重', () => {
+    const catalog = buildDemoTaskCatalog(manifests, 'head', '头车');
+    const plan = resolveSelectedDemoJobs(manifests, catalog, [11, 2, 10, 2]);
+    expect(plan.taskNos).toEqual([2, 10, 11]);
+    expect(plan.jobs.map((job) => job.pluginId)).toEqual(['distance', 'coupler', 'contour']);
+    expect(plan.jobs).toHaveLength(3);
+  });
+
+  it('拒绝当前检测对象不可运行的任务', () => {
+    const catalog = buildDemoTaskCatalog(manifests, 'head', '头车');
+    expect(() => resolveSelectedDemoJobs(manifests, catalog, [9])).toThrow('不适用于当前头车');
+  });
+});
+
+describe('actual plugin demo task catalog', () => {
+  const actualManifests = listPlugins();
+
+  it('返回真实非连续任务号、名称与检测对象动态数量', () => {
+    const head = buildDemoTaskCatalog(actualManifests, 'head', '头车');
+    const middle = buildDemoTaskCatalog(actualManifests, 'middle', '中车');
+    expect(head.total).toBe(39);
+    expect(middle.total).toBe(26);
+    expect(head.items.find((item) => item.taskNo === 11)?.name).toBe('车钩面板的平整度');
+    expect(head.items.some((item) => item.taskNo === 3)).toBe(false);
+    expect(head.items.map((item) => item.taskNo)).toEqual(
+      [...head.items.map((item) => item.taskNo)].sort((a, b) => a - b),
+    );
+  });
+
+  it('任务 2、11、10 生成三个插件作业，单个车钩任务只生成一次共享作业', () => {
+    const head = buildDemoTaskCatalog(actualManifests, 'head', '头车');
+    const mixed = resolveSelectedDemoJobs(actualManifests, head, [2, 11, 10]);
+    expect(mixed.jobs.map((job) => job.pluginId)).toEqual([
+      'train-measurement',
+      'coupler-panel',
+      'flatness-suite',
+    ]);
+    const couplerOnly = resolveSelectedDemoJobs(actualManifests, head, [8]);
+    expect(couplerOnly.jobs).toEqual([{
+      pluginId: 'coupler-panel',
+      taskNos: [8],
+      params: { demoTaskNos: [8] },
+    }]);
+  });
+});
diff --git a/server/demoFlow.ts b/server/demoFlow.ts
new file mode 100644
index 0000000..70e424d
--- /dev/null
+++ b/server/demoFlow.ts
@@ -0,0 +1,120 @@
+import type {
+  DemoInspectionObject,
+  PluginDemoTask,
+  PluginManifest,
+} from './plugins/types.js';
+
+export interface DemoTaskCatalogItem extends PluginDemoTask {
+  pluginId: string;
+  pluginName: string;
+  enabled: boolean;
+  disabledReason?: string;
+}
+
+export interface DemoTaskCatalog {
+  inspectionObject: DemoInspectionObject | 'unknown';
+  inspectionObjectName?: string;
+  total: number;
+  items: DemoTaskCatalogItem[];
+}
+
+export interface DemoSelectedPluginJob {
+  pluginId: string;
+  taskNos: number[];
+  params: Record<string, unknown>;
+}
+
+function disabledReasonFor(
+  task: PluginDemoTask,
+  inspectionObject: DemoInspectionObject | 'unknown',
+  inspectionObjectName?: string,
+): string | undefined {
+  if (!task.inspectionObjects?.length) return undefined;
+  if (inspectionObject === 'unknown') {
+    return inspectionObjectName
+      ? `检测对象“${inspectionObjectName}”尚未配置任务适用规则`
+      : '当前任务尚未确认头车或中车检测对象';
+  }
+  if (!task.inspectionObjects.includes(inspectionObject)) {
+    return `不适用于当前${inspectionObject === 'head' ? '头车' : '中车'}检测对象`;
+  }
+  return undefined;
+}
+
+/** 从插件 manifest 构建服务端权威任务目录。 */
+export function buildDemoTaskCatalog(
+  manifests: readonly PluginManifest[],
+  inspectionObject: DemoInspectionObject | 'unknown',
+  inspectionObjectName?: string,
+): DemoTaskCatalog {
+  const items: DemoTaskCatalogItem[] = [];
+  const claimedTaskNos = new Map<number, string>();
+
+  for (const manifest of manifests) {
+    for (const task of manifest.demoTasks ?? []) {
+      const previousPlugin = claimedTaskNos.get(task.taskNo);
+      if (previousPlugin) {
+        throw new Error(`演示任务 ${task.taskNo} 被插件 ${previousPlugin} 与 ${manifest.id} 重复声明`);
+      }
+      claimedTaskNos.set(task.taskNo, manifest.id);
+      const disabledReason = disabledReasonFor(task, inspectionObject, inspectionObjectName);
+      items.push({
+        ...task,
+        pluginId: manifest.id,
+        pluginName: manifest.name,
+        enabled: disabledReason == null,
+        ...(disabledReason ? { disabledReason } : {}),
+      });
+    }
+  }
+
+  items.sort((a, b) => a.taskNo - b.taskNo);
+  return {
+    inspectionObject,
+    ...(inspectionObjectName ? { inspectionObjectName } : {}),
+    total: items.filter((item) => item.enabled).length,
+    items,
+  };
+}
+
+/** 校验所选任务并转换为最小插件作业集合。 */
+export function resolveSelectedDemoJobs(
+  manifests: readonly PluginManifest[],
+  catalog: DemoTaskCatalog,
+  requestedTaskNos: readonly number[],
+): { taskNos: number[]; jobs: DemoSelectedPluginJob[] } {
+  const taskNos = Array.from(new Set(requestedTaskNos)).sort((a, b) => a - b);
+  if (taskNos.length === 0) throw new Error('请至少选择一个任务');
+
+  const itemByTaskNo = new Map(catalog.items.map((item) => [item.taskNo, item]));
+  for (const taskNo of taskNos) {
+    const item = itemByTaskNo.get(taskNo);
+    if (!item) throw new Error(`任务 ${taskNo} 不存在或当前算法未提供`);
+    if (!item.enabled) throw new Error(`任务 ${taskNo} 当前不可执行：${item.disabledReason ?? '运行条件不满足'}`);
+  }
+
+  const taskNosByPlugin = new Map<string, number[]>();
+  for (const taskNo of taskNos) {
+    const pluginId = itemByTaskNo.get(taskNo)!.pluginId;
+    const pluginTaskNos = taskNosByPlugin.get(pluginId) ?? [];
+    pluginTaskNos.push(taskNo);
+    taskNosByPlugin.set(pluginId, pluginTaskNos);
+  }
+
+  const manifestById = new Map(manifests.map((manifest) => [manifest.id, manifest]));
+  const jobs: DemoSelectedPluginJob[] = [];
+  for (const [pluginId, pluginTaskNos] of Array.from(taskNosByPlugin.entries())) {
+    const manifest = manifestById.get(pluginId);
+    if (!manifest) throw new Error(`未注册的算法插件：${pluginId}`);
+    if (manifest.demoSelection?.kind !== 'task-nos' || !manifest.demoSelection.param) {
+      throw new Error(`算法插件 ${pluginId} 未配置任务选择执行方式`);
+    }
+    jobs.push({
+      pluginId,
+      taskNos: pluginTaskNos,
+      params: { [manifest.demoSelection.param]: pluginTaskNos },
+    });
+  }
+
+  return { taskNos, jobs };
+}
diff --git a/server/plugins/adapters/coupler_panel_run.py b/server/plugins/adapters/coupler_panel_run.py
index fec1c49..b3f6015 100644
--- a/server/plugins/adapters/coupler_panel_run.py
+++ b/server/plugins/adapters/coupler_panel_run.py
@@ -155,23 +155,53 @@ def main() -> int:
         offset_right = 700.0 * _math.tan(_math.radians(raw_right)) if 'raw_right' in dir() else 700.0 * _math.tan(_math.radians(theta_right))
         offset_ref   = 375.0 * _math.tan(_math.radians(raw_ref))   if 'raw_ref'   in dir() else 375.0 * _math.tan(_math.radians(theta_ref))
 
-        measurements = [
-            {
+        inspection_object = str((payload.get("context") or {}).get("inspectionObject") or "unknown")
+        longitudinal_task_no = "10" if inspection_object == "head" else "12" if inspection_object == "middle" else None
+        reference_task_no = "8" if inspection_object == "head" else "9" if inspection_object == "middle" else None
+        raw_selected_task_nos = config.get("demoTaskNos")
+        selected_task_nos = (
+            {str(int(value)) for value in raw_selected_task_nos if isinstance(value, (int, float)) and float(value).is_integer()}
+            if isinstance(raw_selected_task_nos, list)
+            else None
+        )
+
+        def _selected(task_no: str | None) -> bool:
+            return selected_task_nos is None or (task_no is not None and task_no in selected_task_nos)
+
+        measurements = []
+        if _selected(longitudinal_task_no):
+            longitudinal_measurement = {
                 "name": "车钩面板距纵向中心的右偏转角",
                 "value": round(offset_right, 6),
                 "unit": "mm",
                 "baseline": 700.0,
                 "tolerance": 1.0,
                 "status": _status_for(offset_right, 1.0),
-            },
-            {
+            }
+            if longitudinal_task_no:
+                longitudinal_measurement.update({
+                    "taskNo": longitudinal_task_no,
+                    "metricCode": "coupler.longitudinal_right_offset",
+                    "name": "纵向中心右偏转",
+                })
+            measurements.append(longitudinal_measurement)
+        if _selected(reference_task_no):
+            reference_measurement = {
                 "name": "车钩面板距参考面的右偏转角",
                 "value": round(offset_ref, 6),
                 "unit": "mm",
                 "baseline": 375.0,
                 "tolerance": 0.8,
                 "status": _status_for(offset_ref, 0.8),
-            },
+            }
+            if reference_task_no:
+                reference_measurement.update({
+                    "taskNo": reference_task_no,
+                    "metricCode": "coupler.reference_right_offset",
+                    "name": "参考面右偏转",
+                })
+            measurements.append(reference_measurement)
+        measurements.extend([
             {
                 "name": "最大 x 偏差 dx_y",
                 "value": dx_y,
@@ -198,7 +228,7 @@ def main() -> int:
                 "unit": "mm",
                 "status": "info",
             },
-        ]
+        ])
 
         payload_out = {
             "schemaVersion": getattr(result, "schema_version", "1.1"),
diff --git a/server/plugins/adapters/flatness_suite_run.py b/server/plugins/adapters/flatness_suite_run.py
index 3df6e64..2bcd552 100644
--- a/server/plugins/adapters/flatness_suite_run.py
+++ b/server/plugins/adapters/flatness_suite_run.py
@@ -226,8 +226,17 @@ def main() -> int:
             result_template_path = alg_dir / "excel" / "测量结果.xlsx"
             if not result_template_path.is_file():
                 raise RuntimeError(f"内置测量结果模板不存在: {result_template_path}")
+            selected_task_nos = config.get("demoTaskNos")
+            selected_task_ids = (
+                [str(int(value)) for value in selected_task_nos if isinstance(value, (int, float)) and float(value).is_integer()]
+                if isinstance(selected_task_nos, list)
+                else None
+            )
+            if selected_task_ids == []:
+                raise RuntimeError("请至少选择一个轮廓测量任务")
             res = pipeline.run_contour_batch(
-                all_tasks=True,
+                task_ids=selected_task_ids,
+                all_tasks=selected_task_ids is None,
                 data_root=str(data_root),
                 pointcloud_kind="noise",
                 point_chunk_size=8192,
diff --git a/server/plugins/adapters/test_demo_task_selection.py b/server/plugins/adapters/test_demo_task_selection.py
new file mode 100644
index 0000000..9ddebdb
--- /dev/null
+++ b/server/plugins/adapters/test_demo_task_selection.py
@@ -0,0 +1,24 @@
+import importlib.util
+import unittest
+from pathlib import Path
+
+
+def _load_adapter(name: str):
+    path = Path(__file__).with_name(name)
+    spec = importlib.util.spec_from_file_location(path.stem, path)
+    module = importlib.util.module_from_spec(spec)
+    assert spec and spec.loader
+    spec.loader.exec_module(module)
+    return module
+
+
+class DemoTaskSelectionTest(unittest.TestCase):
+    def test_train_task_number_parsing_and_selection(self):
+        adapter = _load_adapter("train_measurement_run.py")
+        self.assertEqual(adapter._task_no_from_name("任务46_车体横断面对角线差值"), "46")
+        self.assertEqual(adapter._selected_task_nos({"demoTaskNos": [2, 46, 2]}), {"2", "46"})
+        self.assertIsNone(adapter._selected_task_nos({}))
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/server/plugins/adapters/train_measurement_run.py b/server/plugins/adapters/train_measurement_run.py
index 411a421..e55cdce 100644
--- a/server/plugins/adapters/train_measurement_run.py
+++ b/server/plugins/adapters/train_measurement_run.py
@@ -19,6 +19,7 @@ v2.2 变更：
 from __future__ import annotations
 
 import os
+import re
 import sys
 import traceback
 from pathlib import Path
@@ -33,6 +34,18 @@ from _plugin_io import (
 )
 
 
+def _task_no_from_name(name: object) -> str | None:
+    match = re.match(r"^任务\s*(\d+)", str(name or ""))
+    return match.group(1) if match else None
+
+
+def _selected_task_nos(config: dict) -> set[str] | None:
+    raw = config.get("demoTaskNos")
+    if not isinstance(raw, list):
+        return None
+    return {str(int(value)) for value in raw if isinstance(value, (int, float)) and float(value).is_integer()}
+
+
 def _to_float(value):
     if value is None:
         return None
@@ -155,6 +168,13 @@ def main() -> int:
             if t.get("enabled", True)
         }
         tm.tasks = [t for t in tm.tasks if t.name in _enabled_names]
+        selected_task_nos = _selected_task_nos(config)
+        if selected_task_nos is not None:
+            available_task_nos = {_task_no_from_name(task.name) for task in tm.tasks}
+            missing_task_nos = selected_task_nos - available_task_nos
+            if missing_task_nos:
+                raise RuntimeError(f"测距配置中找不到所选任务：{','.join(sorted(missing_task_nos, key=int))}")
+            tm.tasks = [task for task in tm.tasks if _task_no_from_name(task.name) in selected_task_nos]
 
         # 注入可视化输出目录
         viz_dir = out_dir / "visualizations"
diff --git a/server/plugins/adapters/underframe_deflection_run.py b/server/plugins/adapters/underframe_deflection_run.py
index 59a7e59..333a392 100644
--- a/server/plugins/adapters/underframe_deflection_run.py
+++ b/server/plugins/adapters/underframe_deflection_run.py
@@ -49,6 +49,11 @@ def main() -> int:
     try:
         emit_progress(0.05, "加载挠度算法包 v1.2.1")
 
+        selected_task_nos = config.get("demoTaskNos")
+        if isinstance(selected_task_nos, list) and 5 not in selected_task_nos:
+            write_error_result(out_dir, "构架挠度插件仅支持任务 5")
+            return 1
+
         # ── 输入文件 ────────────────────────────────────────────────────────
         pointcloud_path = first_pointcloud(payload)
         if not pointcloud_path:
diff --git a/server/plugins/manifests/coupler-panel.json b/server/plugins/manifests/coupler-panel.json
index 98b083e..641d90c 100644
--- a/server/plugins/manifests/coupler-panel.json
+++ b/server/plugins/manifests/coupler-panel.json
@@ -8,6 +8,13 @@
   "category": "几何测量",
   "requiresPointCloud": true,
   "requiresCad": false,
+  "demoSelection": { "kind": "task-nos", "param": "demoTaskNos" },
+  "demoTasks": [
+    { "taskNo": 8, "name": "车钩面板到参考面的右偏转", "category": "车钩", "inspectionObjects": ["head"] },
+    { "taskNo": 9, "name": "车钩面板到参考面的右偏转", "category": "车钩", "inspectionObjects": ["middle"] },
+    { "taskNo": 10, "name": "车钩面板到纵向中心的右偏转", "category": "车钩", "inspectionObjects": ["head"] },
+    { "taskNo": 12, "name": "车钩面板到纵向中心的右偏转", "category": "车钩", "inspectionObjects": ["middle"] }
+  ],
   "inputs": [
     {
       "name": "profile",
diff --git a/server/plugins/manifests/flatness-suite.json b/server/plugins/manifests/flatness-suite.json
index 32b1c72..1e1cd20 100644
--- a/server/plugins/manifests/flatness-suite.json
+++ b/server/plugins/manifests/flatness-suite.json
@@ -8,6 +8,29 @@
   "category": "几何测量",
   "requiresPointCloud": false,
   "requiresCad": false,
+  "demoSelection": { "kind": "task-nos", "param": "demoTaskNos" },
+  "demoTasks": [
+    { "taskNo": 11, "name": "车钩面板的平整度", "category": "轮廓", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 13, "name": "车长方向平面度", "category": "轮廓", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 17, "name": "车高方向弧形轮廓测量", "category": "轮廓", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 20, "name": "门柱平整度", "category": "轮廓", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 22, "name": "从门口到外部轮廓的距离", "category": "轮廓", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 23, "name": "从窗口到外部轮廓的距离", "category": "轮廓", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 25, "name": "内风挡外圈平面度", "category": "轮廓", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 26, "name": "内风挡区域平面度", "category": "轮廓", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 27, "name": "外风挡区域平面度", "category": "轮廓", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 31, "name": "车头前墙区域平面度", "category": "轮廓", "inspectionObjects": ["head"] },
+    { "taskNo": 34, "name": "司机室门外弧形轮廓", "category": "轮廓", "inspectionObjects": ["head"] },
+    { "taskNo": 35, "name": "前窗框侧轮廓", "category": "轮廓", "inspectionObjects": ["head"] },
+    { "taskNo": 36, "name": "前窗框弧形轮廓", "category": "轮廓", "inspectionObjects": ["head"] },
+    { "taskNo": 37, "name": "顶灯框侧轮廓", "category": "轮廓", "inspectionObjects": ["head"] },
+    { "taskNo": 38, "name": "顶灯框弧形轮廓", "category": "轮廓", "inspectionObjects": ["head"] },
+    { "taskNo": 39, "name": "逃生窗侧轮廓", "category": "轮廓", "inspectionObjects": ["head"] },
+    { "taskNo": 40, "name": "逃生窗弧形轮廓", "category": "轮廓", "inspectionObjects": ["head"] },
+    { "taskNo": 41, "name": "曲面窗侧轮廓", "category": "轮廓", "inspectionObjects": ["head"] },
+    { "taskNo": 42, "name": "曲面窗弧形轮廓", "category": "轮廓", "inspectionObjects": ["head"] },
+    { "taskNo": 45, "name": "地板平度", "category": "轮廓", "inspectionObjects": ["head", "middle"] }
+  ],
   "inputs": [
     {
       "name": "useBatchDatasets",
diff --git a/server/plugins/manifests/train-measurement.json b/server/plugins/manifests/train-measurement.json
index 38c881f..78af936 100644
--- a/server/plugins/manifests/train-measurement.json
+++ b/server/plugins/manifests/train-measurement.json
@@ -8,6 +8,25 @@
   "category": "尺寸测量",
   "requiresPointCloud": true,
   "requiresCad": false,
+  "demoSelection": { "kind": "task-nos", "param": "demoTaskNos" },
+  "demoTasks": [
+    { "taskNo": 1, "name": "转向架距离", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 2, "name": "车体长度", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 7, "name": "边梁下平面到参考线的距离", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 15, "name": "侧墙最大点到参考平面距离", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 16, "name": "车体最大宽度", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 18, "name": "门口宽度", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 21, "name": "侧门高度", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 28, "name": "端门口宽度", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 29, "name": "端门口高度", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 30, "name": "参考线到司机室辅助孔距离", "category": "尺寸", "inspectionObjects": ["head"] },
+    { "taskNo": 32, "name": "司机室登车门门口宽度", "category": "尺寸", "inspectionObjects": ["head"] },
+    { "taskNo": 33, "name": "司机室登车门门口高度", "category": "尺寸", "inspectionObjects": ["head"] },
+    { "taskNo": 43, "name": "窗口下沿高度", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 44, "name": "车顶高度", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 46, "name": "车体横断面对角线差值", "category": "尺寸", "inspectionObjects": ["head", "middle"] },
+    { "taskNo": 47, "name": "内端墙门口高度", "category": "尺寸", "inspectionObjects": ["head", "middle"] }
+  ],
   "uiPanel": "train-measurement",
   "inputs": [
     {
diff --git a/server/plugins/manifests/underframe-deflection.json b/server/plugins/manifests/underframe-deflection.json
index 22b2b3e..f1ad566 100644
--- a/server/plugins/manifests/underframe-deflection.json
+++ b/server/plugins/manifests/underframe-deflection.json
@@ -8,6 +8,10 @@
   "category": "几何测量",
   "requiresPointCloud": true,
   "requiresCad": false,
+  "demoSelection": { "kind": "task-nos", "param": "demoTaskNos" },
+  "demoTasks": [
+    { "taskNo": 5, "name": "纵向梁到直线的垂直偏差（挠度）", "category": "挠度", "inspectionObjects": ["head", "middle"] }
+  ],
   "inputs": [
     {
       "name": "leftRoiPath",
diff --git a/server/plugins/types.ts b/server/plugins/types.ts
index 5fe3b39..9440960 100644
--- a/server/plugins/types.ts
+++ b/server/plugins/types.ts
@@ -68,6 +68,22 @@ export interface PluginRuntimeMock {
 
 export type PluginRuntime = PluginRuntimeProcess | PluginRuntimeMock;
 
+export type DemoInspectionObject = 'head' | 'middle';
+
+/** 插件可在“全流程任务选择”中暴露的正式检验任务。 */
+export interface PluginDemoTask {
+  taskNo: number;
+  name: string;
+  category: string;
+  inspectionObjects?: DemoInspectionObject[];
+}
+
+/** 任务选择如何转换为插件参数。 */
+export interface PluginDemoSelection {
+  kind: 'task-nos';
+  param: string;
+}
+
 /** 插件 manifest（写在 server/plugins/manifests/*.json） */
 export interface PluginManifest {
   /** 全局唯一 ID（kebab-case，例如 coupler-panel） */
@@ -89,6 +105,10 @@ export interface PluginManifest {
   requiresCad?: boolean;
   /** 是否需要点云（默认 true） */
   requiresPointCloud?: boolean;
+  /** “选择任务运行”模式的权威任务目录。 */
+  demoTasks?: PluginDemoTask[];
+  /** 选中任务传给适配器的方式。 */
+  demoSelection?: PluginDemoSelection;
   runtime: PluginRuntime;
 }
 
diff --git a/server/routers.ts b/server/routers.ts
index c965eb9..4500a83 100644
--- a/server/routers.ts
+++ b/server/routers.ts
@@ -13,6 +13,7 @@ import { enqueueDeviationHeatmapJob } from "./deviationHeatmapJob.js";
 import { enqueueSmoothHeatmapJob } from "./smoothHeatmapJob.js";
 import { stepParseCacheDir } from "./stepParse.js";
 import { listPlugins, getPlugin } from "./plugins/registry.js";
+import { buildDemoTaskCatalog, resolveSelectedDemoJobs } from "./demoFlow.js";
 import { enqueueAlgorithmJob, algorithmJobStats, cancelAlgorithmJob, cancelAlgorithmJobsByTask } from "./algorithmJob.js";
 import { cancelLegacyAnalysisJob, cancelLegacyAnalysisJobsByTask } from "./analysisJobControl.js";
 import { deleteAnalysisResult } from "./analysisResultDeletion.js";
@@ -313,13 +314,26 @@ async function cancelTaskAnalysisResultsByTask(taskId: number, reason = "用户
   };
 }
 
+interface DemoFlowMeasurementJob {
+  pluginId: string;
+  params?: Record<string, unknown>;
+  taskNos?: number[];
+}
+
+interface DemoFlowMetadata {
+  demoFlowMode: "all" | "selected";
+  demoFlowSelectedTaskNos?: number[];
+  demoFlowSelectedTaskCount?: number;
+}
+
 async function enqueueDemoRegisteredMeasurementsAfterRegistration(input: {
   taskId: number;
   sourcePointCloudFileId: number;
   cadFileId: number;
   registrationResultId: number;
-  measurementPluginIds: string[];
+  measurementJobs: DemoFlowMeasurementJob[];
   demoFlowRunId: string;
+  metadata: DemoFlowMetadata;
 }) {
   const registrationResult = await db.getTaskAnalysisResultById(input.registrationResultId);
   if (registrationResult?.status !== "completed") {
@@ -335,13 +349,14 @@ async function enqueueDemoRegisteredMeasurementsAfterRegistration(input: {
     return;
   }
 
-  for (let idx = 0; idx < input.measurementPluginIds.length; idx += 1) {
-    const pluginId = input.measurementPluginIds[idx];
+  for (let idx = 0; idx < input.measurementJobs.length; idx += 1) {
+    const job = input.measurementJobs[idx];
+    const pluginId = job.pluginId;
     const manifest = getPlugin(pluginId);
     await createAndEnqueuePluginJob({
       taskId: input.taskId,
       pluginId,
-      params: paramsForDemoPlugin(pluginId),
+      params: { ...paramsForDemoPlugin(pluginId), ...(job.params ?? {}) },
       pointCloudFileIds: DEMO_REGISTERED_POINTCLOUD_PLUGIN_IDS.has(pluginId)
         ? [registered.id]
         : [input.sourcePointCloudFileId],
@@ -350,14 +365,86 @@ async function enqueueDemoRegisteredMeasurementsAfterRegistration(input: {
         demoFlowRunId: input.demoFlowRunId,
         demoFlowRole: "measurement",
         demoFlowIndex: idx + 2,
-        demoFlowTotal: input.measurementPluginIds.length + 1,
+        demoFlowTotal: input.measurementJobs.length + 1,
         demoFlowSourcePointCloudFileId: input.sourcePointCloudFileId,
         demoFlowCadFileId: input.cadFileId,
+        ...input.metadata,
+        ...(job.taskNos ? { demoFlowPluginTaskNos: job.taskNos } : {}),
       },
     });
   }
 }
 
+async function startDemoFlow(input: {
+  taskId: number;
+  sourcePointCloudFileId: number;
+  cadFileId: number;
+  measurementJobs: DemoFlowMeasurementJob[];
+  metadata: DemoFlowMetadata;
+}) {
+  const demoFlowRunId = randomUUID();
+  clearDemoFlowCancelled(input.taskId);
+  for (const job of input.measurementJobs) {
+    const manifest = getPlugin(job.pluginId);
+    if (!manifest) throw new TRPCError({ code: "NOT_FOUND", message: `未注册的算法插件：${job.pluginId}` });
+    if (manifest.category === "配准") {
+      throw new TRPCError({ code: "BAD_REQUEST", message: "全流程的测量算法列表不能包含配准算法。" });
+    }
+  }
+
+  const pointcloudFiles = await db.listTaskPointcloudFiles(input.taskId);
+  const sourcePointcloud = pointcloudFiles.find((row) => row.id === input.sourcePointCloudFileId);
+  if (!sourcePointcloud) throw new TRPCError({ code: "NOT_FOUND", message: "选中的原始点云文件不存在。" });
+  if (sourcePointcloud.source === "registered") {
+    throw new TRPCError({ code: "BAD_REQUEST", message: "请选择原始点云，系统会自动找到对应配准产物。" });
+  }
+  const cadFiles = await db.listTaskCadFiles(input.taskId);
+  const cad = cadFiles.find((row) => row.id === input.cadFileId);
+  if (!cad) throw new TRPCError({ code: "NOT_FOUND", message: "选中的 CAD 文件不存在。" });
+  await validateTaskInputCompatibility(input.taskId, sourcePointcloud, cad);
+
+  const registration = await createAndEnqueuePluginJob({
+    taskId: input.taskId,
+    pluginId: "vehicle-registration",
+    params: {},
+    pointCloudFileIds: [input.sourcePointCloudFileId],
+    cadFileIds: [input.cadFileId],
+    resultData: {
+      demoFlowRunId,
+      demoFlowRole: "registration",
+      demoFlowIndex: 1,
+      demoFlowTotal: input.measurementJobs.length + 1,
+      demoFlowSourcePointCloudFileId: input.sourcePointCloudFileId,
+      demoFlowCadFileId: input.cadFileId,
+      ...input.metadata,
+    },
+  });
+  const registrationJob = { id: registration.id, pluginId: registration.pluginId };
+  void registration.promise.then(() => {
+    if (isDemoFlowCancelled(input.taskId)) {
+      console.log(`[demoFlow] 任务 ${input.taskId} 已停止全流程，跳过后续测量提交。`);
+      return undefined;
+    }
+    return enqueueDemoRegisteredMeasurementsAfterRegistration({
+      taskId: input.taskId,
+      sourcePointCloudFileId: input.sourcePointCloudFileId,
+      cadFileId: input.cadFileId,
+      registrationResultId: registration.id,
+      measurementJobs: input.measurementJobs,
+      demoFlowRunId,
+      metadata: input.metadata,
+    });
+  }).catch((err) => console.error("[demoFlow] 配准链式提交失败:", err));
+
+  return {
+    success: true as const,
+    jobs: [] as { id: number; pluginId: string }[],
+    registrationJob,
+    queuedMeasurementCount: input.measurementJobs.length,
+    scheduler: algorithmJobStats(),
+  };
+}
+
 export const appRouter = router({
   system: systemRouter,
 
@@ -1325,6 +1412,19 @@ export const appRouter = router({
         return { success: true as const, jobs: created, scheduler: algorithmJobStats() };
       }),
 
+    /** 当前检测对象可用的正式任务目录。 */
+    demoTaskCatalog: protectedProcedure
+      .input(z.object({ taskId: z.number() }))
+      .query(async ({ input }) => {
+        const task = await db.getInspectionTaskById(input.taskId);
+        if (!task) throw new TRPCError({ code: "NOT_FOUND", message: "检测任务不存在。" });
+        const inspectionObject = task.inspectionObjectId
+          ? await db.getInspectionObjectById(task.inspectionObjectId)
+          : undefined;
+        const context = inspectionObjectContextFromName(inspectionObject?.name);
+        return buildDemoTaskCatalog(listPlugins(), context.inspectionObject, context.inspectionObjectName);
+      }),
+
     /** 一键全流程演示：先整车配准，成功后再一起提交测量算法。 */
     runDemoAll: protectedProcedure
       .input(
@@ -1337,85 +1437,50 @@ export const appRouter = router({
       )
       .mutation(async ({ input }) => {
         const measurementPluginIds = normalizeDemoMeasurementPluginIds(input.measurementPluginIds);
-        const demoFlowRunId = randomUUID();
-        clearDemoFlowCancelled(input.taskId);
-        for (const pluginId of measurementPluginIds) {
-          const manifest = getPlugin(pluginId);
-          if (!manifest) {
-            throw new TRPCError({
-              code: "NOT_FOUND",
-              message: `未注册的算法插件：${pluginId}`,
-            });
-          }
-          if (manifest.category === "配准") {
-            throw new TRPCError({
-              code: "BAD_REQUEST",
-              message: "一键全流程演示的测量算法列表不能包含配准算法。",
-            });
-          }
-        }
-
-        const pointcloudFiles = await db.listTaskPointcloudFiles(input.taskId);
-        const sourcePointcloud = pointcloudFiles.find((row) => row.id === input.sourcePointCloudFileId);
-        if (!sourcePointcloud) {
-          throw new TRPCError({ code: "NOT_FOUND", message: "选中的原始点云文件不存在。" });
-        }
-        if (sourcePointcloud.source === "registered") {
-          throw new TRPCError({
-            code: "BAD_REQUEST",
-            message: "请选择原始点云，系统会自动找到对应配准产物。",
-          });
-        }
-
-        const cadFiles = await db.listTaskCadFiles(input.taskId);
-        const cad = cadFiles.find((row) => row.id === input.cadFileId);
-        if (!cad) {
-          throw new TRPCError({ code: "NOT_FOUND", message: "选中的 CAD 文件不存在。" });
-        }
-        await validateTaskInputCompatibility(input.taskId, sourcePointcloud, cad);
-
-        const registration = await createAndEnqueuePluginJob({
+        return startDemoFlow({
           taskId: input.taskId,
-          pluginId: "vehicle-registration",
-          params: {},
-          pointCloudFileIds: [input.sourcePointCloudFileId],
-          cadFileIds: [input.cadFileId],
-          resultData: {
-            demoFlowRunId,
-            demoFlowRole: "registration",
-            demoFlowIndex: 1,
-            demoFlowTotal: measurementPluginIds.length + 1,
-            demoFlowSourcePointCloudFileId: input.sourcePointCloudFileId,
-            demoFlowCadFileId: input.cadFileId,
+          sourcePointCloudFileId: input.sourcePointCloudFileId,
+          cadFileId: input.cadFileId,
+          measurementJobs: measurementPluginIds.map((pluginId) => ({ pluginId })),
+          metadata: { demoFlowMode: "all" },
+        });
+      }),
+
+    /** 自选任务全流程：服务端校验任务并只提交覆盖所选任务的最小插件集合。 */
+    runDemoSelected: protectedProcedure
+      .input(z.object({
+        taskId: z.number(),
+        sourcePointCloudFileId: z.number(),
+        cadFileId: z.number(),
+        taskNos: z.array(z.number().int().positive()).min(1).max(64),
+      }))
+      .mutation(async ({ input }) => {
+        const task = await db.getInspectionTaskById(input.taskId);
+        if (!task) throw new TRPCError({ code: "NOT_FOUND", message: "检测任务不存在。" });
+        const inspectionObject = task.inspectionObjectId
+          ? await db.getInspectionObjectById(task.inspectionObjectId)
+          : undefined;
+        const context = inspectionObjectContextFromName(inspectionObject?.name);
+        const manifests = listPlugins();
+        const catalog = buildDemoTaskCatalog(manifests, context.inspectionObject, context.inspectionObjectName);
+        let selectedPlan: ReturnType<typeof resolveSelectedDemoJobs>;
+        try {
+          selectedPlan = resolveSelectedDemoJobs(manifests, catalog, input.taskNos);
+        } catch (error) {
+          throw new TRPCError({ code: "BAD_REQUEST", message: error instanceof Error ? error.message : "所选任务无效" });
+        }
+        const result = await startDemoFlow({
+          taskId: input.taskId,
+          sourcePointCloudFileId: input.sourcePointCloudFileId,
+          cadFileId: input.cadFileId,
+          measurementJobs: selectedPlan.jobs,
+          metadata: {
+            demoFlowMode: "selected",
+            demoFlowSelectedTaskNos: selectedPlan.taskNos,
+            demoFlowSelectedTaskCount: selectedPlan.taskNos.length,
           },
         });
-        const registrationJob = { id: registration.id, pluginId: registration.pluginId };
-        void registration.promise
-          .then(() => {
-            if (isDemoFlowCancelled(input.taskId)) {
-              console.log(`[runDemoAll] 任务 ${input.taskId} 已停止全流程，跳过后续测量提交。`);
-              return undefined;
-            }
-            return enqueueDemoRegisteredMeasurementsAfterRegistration({
-              taskId: input.taskId,
-              sourcePointCloudFileId: input.sourcePointCloudFileId,
-              cadFileId: input.cadFileId,
-              registrationResultId: registration.id,
-              measurementPluginIds,
-              demoFlowRunId,
-            });
-          })
-          .catch((err) => {
-            console.error("[runDemoAll] 配准链式提交失败:", err);
-          });
-
-        return {
-          success: true as const,
-          jobs: [] as { id: number; pluginId: string }[],
-          registrationJob,
-          queuedMeasurementCount: measurementPluginIds.length,
-          scheduler: algorithmJobStats(),
-        };
+        return { ...result, selectedTaskNos: selectedPlan.taskNos };
       }),
 
     cancelDemoAll: protectedProcedure