diff --git a/serve/backend/app/api/screener.py b/serve/backend/app/api/screener.py
index 3a40b3b..56fb624 100644
--- a/serve/backend/app/api/screener.py
+++ b/serve/backend/app/api/screener.py
@@ -296,13 +296,14 @@ def get_cached(
 
 
 @router.get("/market-snapshot")
-def market_snapshot(request: Request):
-    """最新全市场轻量行情快照，供板块/概念聚合分析使用。"""
+def market_snapshot(request: Request, as_of: date | None = None):
+    """全市场轻量行情快照（可选指定日期），供板块/概念聚合分析使用。"""
     import polars as pl
 
     repo = request.app.state.repo
     svc = ScreenerService(repo)
-    as_of = svc.latest_date()
+    if as_of is None:
+        as_of = svc.latest_date()
     if not as_of:
         return {"as_of": None, "rows": []}
 
diff --git a/serve/frontend/src/lib/api.ts b/serve/frontend/src/lib/api.ts
index 4fd71e4..0ae9d37 100644
--- a/serve/frontend/src/lib/api.ts
+++ b/serve/frontend/src/lib/api.ts
@@ -882,8 +882,8 @@ export const api = {
         ? `/api/screener/cached?ext_columns=${encodeURIComponent(extColumns)}`
         : '/api/screener/cached',
     ),
-  marketSnapshot: () =>
-    request<{ as_of: string | null; rows: MarketSnapshotRow[] }>('/api/screener/market-snapshot'),
+  marketSnapshot: (asOf?: string) =>
+    request<{ as_of: string | null; rows: MarketSnapshotRow[] }>(`/api/screener/market-snapshot${asOf ? `?as_of=${asOf}` : ''}`),
   overviewMarket: (asOf?: string) => request<OverviewMarket>(`/api/overview/market${asOf ? `?as_of=${asOf}` : ''}`),
 
   // 概念涨幅轮动矩阵: 每列(日期)各自把所有概念按当天涨幅从高到低排序
diff --git a/serve/frontend/src/pages/ConceptAnalysis.tsx b/serve/frontend/src/pages/ConceptAnalysis.tsx
index 8d64997..d7142df 100644
--- a/serve/frontend/src/pages/ConceptAnalysis.tsx
+++ b/serve/frontend/src/pages/ConceptAnalysis.tsx
@@ -15,6 +15,7 @@ import { PageHeader } from '@/components/PageHeader'
 import { EmptyState } from '@/components/EmptyState'
 import { type AnalysisFieldConfig } from '@/components/analysis-shared'
 import { StockPreviewDialog } from '@/components/StockPreviewDialog'
+import { DatePicker } from '@/components/DatePicker'
 import { RpsRotationDialog } from '@/components/RpsRotationDialog'
 import { api, type MarketSnapshotRow } from '@/lib/api'
 import { QK } from '@/lib/queryKeys'
@@ -238,6 +239,7 @@ export function ConceptAnalysis() {
   const [previewSymbol, setPreviewSymbol] = useState<string | null>(null)
   const [previewName, setPreviewName] = useState<string>('')
   const [showRps, setShowRps] = useState(false)
+  const [asOf, setAsOf] = useState('')
 
   const configsQuery = useQuery({ queryKey: QK.extData, queryFn: api.extDataList })
   const availableConfigs = configsQuery.data?.items ?? []
@@ -249,14 +251,14 @@ export function ConceptAnalysis() {
   const activeConfig = availableConfigs.find(c => c.id === activeConfigId)
 
   const rowsQuery = useQuery({
-    queryKey: QK.extDataRows(activeConfigId, undefined, PAGE_LIMIT),
-    queryFn: () => api.extDataRows(activeConfigId, { limit: PAGE_LIMIT }),
+    queryKey: QK.extDataRows(activeConfigId, asOf || undefined, PAGE_LIMIT),
+    queryFn: () => api.extDataRows(activeConfigId, { date: asOf || undefined, limit: PAGE_LIMIT }),
     enabled: !!activeConfigId,
   })
 
   const marketQuery = useQuery({
-    queryKey: QK.marketSnapshot,
-    queryFn: api.marketSnapshot,
+    queryKey: ['market-snapshot', asOf],
+    queryFn: () => api.marketSnapshot(asOf || undefined),
     staleTime: 60_000,
   })
 
@@ -317,9 +319,10 @@ export function ConceptAnalysis() {
     <>
       <PageHeader
         title="概念分析"
-        subtitle={`${marketQuery.data?.as_of ?? rowsQuery.data?.date ?? '最新'} · ${stats.length} 个概念 · ${totalSymbols} 只标的`}
+        subtitle={`${asOf || marketQuery.data?.as_of || rowsQuery.data?.date || '最新'} · ${stats.length} 个概念 · ${totalSymbols} 只标的`}
         right={
           <div className="flex items-center gap-1">
+            <DatePicker value={asOf} onChange={setAsOf} className="w-28" />
             {/* RPS 轮动: 打开涨幅轮动矩阵对话框 */}
             <button
               onClick={() => setShowRps(true)}
diff --git a/serve/frontend/src/pages/IndustryAnalysis.tsx b/serve/frontend/src/pages/IndustryAnalysis.tsx
index f83d434..68f5284 100644
--- a/serve/frontend/src/pages/IndustryAnalysis.tsx
+++ b/serve/frontend/src/pages/IndustryAnalysis.tsx
@@ -9,6 +9,7 @@ import {
   TrendingDown,
   TrendingUp,
 } from 'lucide-react'
+import { DatePicker } from '@/components/DatePicker'
 import { PageHeader } from '@/components/PageHeader'
 import { EmptyState } from '@/components/EmptyState'
 import { DimensionHeatmap, type AnalysisFieldConfig } from '@/components/analysis-shared'
@@ -269,6 +270,7 @@ export function IndustryAnalysis() {
   const [sortMode, setSortMode] = useState<SortMode>('heat')
   const [previewSymbol, setPreviewSymbol] = useState<string | null>(null)
   const [previewName, setPreviewName] = useState<string>('')
+  const [asOf, setAsOf] = useState('')
 
   const configsQuery = useQuery({ queryKey: QK.extData, queryFn: api.extDataList })
   const availableConfigs = configsQuery.data?.items ?? []
@@ -280,14 +282,14 @@ export function IndustryAnalysis() {
   const activeConfig = availableConfigs.find(c => c.id === activeConfigId)
 
   const rowsQuery = useQuery({
-    queryKey: QK.extDataRows(activeConfigId, undefined, PAGE_LIMIT),
-    queryFn: () => api.extDataRows(activeConfigId, { limit: PAGE_LIMIT }),
+    queryKey: QK.extDataRows(activeConfigId, asOf || undefined, PAGE_LIMIT),
+    queryFn: () => api.extDataRows(activeConfigId, { date: asOf || undefined, limit: PAGE_LIMIT }),
     enabled: !!activeConfigId,
   })
 
   const marketQuery = useQuery({
-    queryKey: QK.marketSnapshot,
-    queryFn: api.marketSnapshot,
+    queryKey: ['market-snapshot', asOf],
+    queryFn: () => api.marketSnapshot(asOf || undefined),
     staleTime: 60_000,
   })
 
@@ -367,7 +369,10 @@ export function IndustryAnalysis() {
     <>
       <PageHeader
         title="行业分析"
-        subtitle={`${industryLevelLabel} · ${marketQuery.data?.as_of ?? rowsQuery.data?.date ?? '最新'} · ${stats.length} 个行业 · ${totalSymbols} 只标的`}
+        subtitle={`${industryLevelLabel} · ${asOf || marketQuery.data?.as_of || rowsQuery.data?.date || '最新'} · ${stats.length} 个行业 · ${totalSymbols} 只标的`}
+        right={
+          <DatePicker value={asOf} onChange={setAsOf} className="w-28" />
+        }
       />
 
       <div className="min-h-full bg-[radial-gradient(circle_at_12%_0%,rgba(245,158,11,0.12),transparent_28%),radial-gradient(circle_at_85%_8%,rgba(244,63,94,0.08),transparent_28%)] px-6 py-5">