diff --git a/frontend/web/src/api.ts b/frontend/web/src/api.ts
index f2f8bc0..19de612 100644
--- a/frontend/web/src/api.ts
+++ b/frontend/web/src/api.ts
@@ -715,6 +715,34 @@ export interface CreateIntelligentEvalPayload {
   time_window_hours: number
 }
 
+export interface ConfigSnapshot {
+  id: string
+  eval_id: string
+  snapshot_type: 'created' | 'plan_submitted' | 'config_updated'
+  goal: string
+  seeds: Record<string, unknown>
+  intent: string
+  role_description: string
+  time_window_hours: number
+  plan: IntelligentEvalPlan | null
+  created_at: string | null
+  created_by: string
+}
+
+export interface ConfigSnapshotComparison {
+  snapshot_1: {
+    id: string
+    snapshot_type: string
+    created_at: string | null
+  }
+  snapshot_2: {
+    id: string
+    snapshot_type: string
+    created_at: string | null
+  }
+  differences: Record<string, { old: unknown; new: unknown }>
+}
+
 export const intelligentEvalsApi = {
   list: () => api.get<{ intelligent_evals: IntelligentEval[] }>('/intelligent-evals'),
   get: (id: string) => api.get<IntelligentEval>(`/intelligent-evals/${id}`),
@@ -739,6 +767,16 @@ export const intelligentEvalsApi = {
     a.click()
     URL.revokeObjectURL(url)
   },
+  // Config Snapshots
+  listConfigSnapshots: (id: string) =>
+    api.get<{ snapshots: ConfigSnapshot[] }>(`/intelligent-evals/${id}/config-snapshots`),
+  getConfigSnapshot: (id: string, snapshotId: string) =>
+    api.get<ConfigSnapshot>(`/intelligent-evals/${id}/config-snapshots/${snapshotId}`),
+  compareConfigSnapshots: (id: string, snapshotId1: string, snapshotId2: string) =>
+    api.post<ConfigSnapshotComparison>(`/intelligent-evals/${id}/config-snapshots/compare`, {
+      snapshot_id_1: snapshotId1,
+      snapshot_id_2: snapshotId2,
+    }),
 }
 
 // ── File Management ──────────────────────────────────────────────
diff --git a/frontend/web/src/components/intelligent_eval/ConfigSnapshots.tsx b/frontend/web/src/components/intelligent_eval/ConfigSnapshots.tsx
new file mode 100644
index 0000000..3adaf7c
--- /dev/null
+++ b/frontend/web/src/components/intelligent_eval/ConfigSnapshots.tsx
@@ -0,0 +1,266 @@
+import { useState } from 'react'
+import {
+  Button, Card, Descriptions, Empty, Space, Table, Tag, message,
+} from 'antd'
+import type { ColumnsType } from 'antd/es/table'
+import { ArrowLeftOutlined, DiffOutlined } from '@ant-design/icons'
+import { intelligentEvalsApi, type ConfigSnapshot, type ConfigSnapshotComparison } from '../../api'
+import { colors } from '../../tokens'
+import { formatDateTime } from '../../utils/date'
+
+const SNAPSHOT_TYPE_LABELS: Record<string, { label: string; color: string }> = {
+  created: { label: '创建', color: 'green' },
+  plan_submitted: { label: '计划提交', color: 'blue' },
+  config_updated: { label: '配置更新', color: 'orange' },
+}
+
+interface ConfigSnapshotsProps {
+  evalId: string
+  onBack: () => void
+}
+
+export default function ConfigSnapshots({ evalId, onBack }: ConfigSnapshotsProps) {
+  const [snapshots, setSnapshots] = useState<ConfigSnapshot[] | null>(null)
+  const [loading, setLoading] = useState(false)
+  const [selectedSnapshot, setSelectedSnapshot] = useState<ConfigSnapshot | null>(null)
+  const [compareMode, setCompareMode] = useState(false)
+  const [selectedForCompare, setSelectedForCompare] = useState<string[]>([])
+  const [comparison, setComparison] = useState<ConfigSnapshotComparison | null>(null)
+
+  const loadSnapshots = async () => {
+    setLoading(true)
+    try {
+      const res = await intelligentEvalsApi.listConfigSnapshots(evalId)
+      setSnapshots(res.data.snapshots)
+    } catch {
+      message.error('加载配置快照失败')
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  useState(() => {
+    void loadSnapshots()
+  })
+
+  const handleViewDetail = async (snapshot: ConfigSnapshot) => {
+    try {
+      const res = await intelligentEvalsApi.getConfigSnapshot(evalId, snapshot.id)
+      setSelectedSnapshot(res.data)
+    } catch {
+      message.error('加载快照详情失败')
+    }
+  }
+
+  const handleCompare = async () => {
+    if (selectedForCompare.length !== 2) {
+      message.warning('请选择两个快照进行对比')
+      return
+    }
+
+    try {
+      const res = await intelligentEvalsApi.compareConfigSnapshots(
+        evalId,
+        selectedForCompare[0],
+        selectedForCompare[1],
+      )
+      setComparison(res.data)
+      setCompareMode(true)
+    } catch {
+      message.error('对比快照失败')
+    }
+  }
+
+  const handleExport = (snapshot: ConfigSnapshot) => {
+    const data = JSON.stringify(snapshot, null, 2)
+    const blob = new Blob([data], { type: 'application/json' })
+    const url = URL.createObjectURL(blob)
+    const a = document.createElement('a')
+    a.href = url
+    a.download = `config-snapshot-${snapshot.id.slice(0, 8)}.json`
+    a.click()
+    URL.revokeObjectURL(url)
+    message.success('已导出快照')
+  }
+
+  const columns: ColumnsType<ConfigSnapshot> = [
+    {
+      title: '时间',
+      dataIndex: 'created_at',
+      key: 'created_at',
+      render: (val: string | null) => formatDateTime(val),
+    },
+    {
+      title: '类型',
+      dataIndex: 'snapshot_type',
+      key: 'snapshot_type',
+      render: (val: string) => {
+        const info = SNAPSHOT_TYPE_LABELS[val] ?? { label: val, color: 'default' }
+        return <Tag color={info.color}>{info.label}</Tag>
+      },
+    },
+    {
+      title: '创建者',
+      dataIndex: 'created_by',
+      key: 'created_by',
+    },
+    {
+      title: '操作',
+      key: 'actions',
+      render: (_, record) => (
+        <Space>
+          <Button size="small" onClick={() => handleViewDetail(record)}>查看</Button>
+          <Button size="small" onClick={() => handleExport(record)}>导出</Button>
+        </Space>
+      ),
+    },
+  ]
+
+  const rowSelection = {
+    selectedRowKeys: selectedForCompare,
+    onChange: (keys: React.Key[]) => {
+      if (keys.length > 2) {
+        message.warning('最多选择两个快照进行对比')
+        return
+      }
+      setSelectedForCompare(keys as string[])
+    },
+  }
+
+  if (selectedSnapshot) {
+    return (
+      <div style={{ height: '100%', overflowY: 'auto', padding: 16 }}>
+        <div style={{ display: 'flex', alignItems: 'center', gap: 8, marginBottom: 16 }}>
+          <Button icon={<ArrowLeftOutlined />} onClick={() => setSelectedSnapshot(null)}>返回</Button>
+          <span style={{ fontSize: 16, fontWeight: 600 }}>快照详情</span>
+          <Tag color={SNAPSHOT_TYPE_LABELS[selectedSnapshot.snapshot_type]?.color ?? 'default'}>
+            {SNAPSHOT_TYPE_LABELS[selectedSnapshot.snapshot_type]?.label ?? selectedSnapshot.snapshot_type}
+          </Tag>
+        </div>
+
+        <Card size="small" title="配置信息" style={{ marginBottom: 16 }}>
+          <Descriptions column={1} size="small">
+            <Descriptions.Item label="评估目标">{selectedSnapshot.goal || '—'}</Descriptions.Item>
+            <Descriptions.Item label="考察意图">{selectedSnapshot.intent || '—'}</Descriptions.Item>
+            <Descriptions.Item label="角色描述">
+              <span style={{ whiteSpace: 'pre-wrap' }}>{selectedSnapshot.role_description || '—'}</span>
+            </Descriptions.Item>
+            <Descriptions.Item label="时间窗口">{selectedSnapshot.time_window_hours} 小时</Descriptions.Item>
+            <Descriptions.Item label="种子集">
+              {Object.keys(selectedSnapshot.seeds ?? {}).length === 0
+                ? '—'
+                : (
+                  <pre style={{
+                    margin: 0, fontSize: 12, background: colors.bgSubtle,
+                    padding: 8, borderRadius: 6, overflowX: 'auto',
+                  }}
+                  >
+                    {JSON.stringify(selectedSnapshot.seeds, null, 2)}
+                  </pre>
+                )}
+            </Descriptions.Item>
+          </Descriptions>
+        </Card>
+
+        {selectedSnapshot.plan && (
+          <Card size="small" title="粗计划">
+            <pre style={{
+              margin: 0, fontSize: 12, background: colors.bgSubtle,
+              padding: 8, borderRadius: 6, overflowX: 'auto',
+            }}
+            >
+              {JSON.stringify(selectedSnapshot.plan, null, 2)}
+            </pre>
+          </Card>
+        )}
+      </div>
+    )
+  }
+
+  if (compareMode && comparison) {
+    return (
+      <div style={{ height: '100%', overflowY: 'auto', padding: 16 }}>
+        <div style={{ display: 'flex', alignItems: 'center', gap: 8, marginBottom: 16 }}>
+          <Button icon={<ArrowLeftOutlined />} onClick={() => setCompareMode(false)}>返回</Button>
+          <span style={{ fontSize: 16, fontWeight: 600 }}>快照对比</span>
+        </div>
+
+        <Card size="small" title="对比信息" style={{ marginBottom: 16 }}>
+          <Descriptions column={2} size="small">
+            <Descriptions.Item label="快照 1">
+              <Tag>{comparison.snapshot_1.snapshot_type}</Tag>
+              {formatDateTime(comparison.snapshot_1.created_at)}
+            </Descriptions.Item>
+            <Descriptions.Item label="快照 2">
+              <Tag>{comparison.snapshot_2.snapshot_type}</Tag>
+              {formatDateTime(comparison.snapshot_2.created_at)}
+            </Descriptions.Item>
+          </Descriptions>
+        </Card>
+
+        <Card size="small" title="差异">
+          {Object.keys(comparison.differences).length === 0 ? (
+            <Empty description="两个快照完全相同" />
+          ) : (
+            <div>
+              {Object.entries(comparison.differences).map(([field, diff]) => (
+                <div key={field} style={{ marginBottom: 16 }}>
+                  <div style={{ fontWeight: 500, marginBottom: 8 }}>{field}</div>
+                  <div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr', gap: 12 }}>
+                    <div>
+                      <div style={{ fontSize: 12, color: colors.textSecondary, marginBottom: 4 }}>旧值</div>
+                      <pre style={{
+                        margin: 0, fontSize: 12, background: '#fff1f0',
+                        padding: 8, borderRadius: 6, overflowX: 'auto',
+                      }}
+                      >
+                        {typeof diff.old === 'object' ? JSON.stringify(diff.old, null, 2) : String(diff.old ?? '—')}
+                      </pre>
+                    </div>
+                    <div>
+                      <div style={{ fontSize: 12, color: colors.textSecondary, marginBottom: 4 }}>新值</div>
+                      <pre style={{
+                        margin: 0, fontSize: 12, background: '#f6ffed',
+                        padding: 8, borderRadius: 6, overflowX: 'auto',
+                      }}
+                      >
+                        {typeof diff.new === 'object' ? JSON.stringify(diff.new, null, 2) : String(diff.new ?? '—')}
+                      </pre>
+                    </div>
+                  </div>
+                </div>
+              ))}
+            </div>
+          )}
+        </Card>
+      </div>
+    )
+  }
+
+  return (
+    <div style={{ height: '100%', overflowY: 'auto', padding: 16 }}>
+      <div style={{ display: 'flex', alignItems: 'center', gap: 8, marginBottom: 16 }}>
+        <Button icon={<ArrowLeftOutlined />} onClick={onBack}>返回</Button>
+        <span style={{ fontSize: 16, fontWeight: 600 }}>配置历史</span>
+        <div style={{ flex: 1 }} />
+        <Button
+          icon={<DiffOutlined />}
+          disabled={selectedForCompare.length !== 2}
+          onClick={handleCompare}
+        >
+          对比选中
+        </Button>
+      </div>
+
+      <Table
+        rowKey="id"
+        loading={loading}
+        dataSource={snapshots ?? []}
+        columns={columns}
+        rowSelection={rowSelection}
+        pagination={false}
+        locale={{ emptyText: <Empty description="暂无配置快照" /> }}
+      />
+    </div>
+  )
+}
diff --git a/frontend/web/src/components/intelligent_eval/EvalDetail.tsx b/frontend/web/src/components/intelligent_eval/EvalDetail.tsx
index d929fd1..7731715 100644
--- a/frontend/web/src/components/intelligent_eval/EvalDetail.tsx
+++ b/frontend/web/src/components/intelligent_eval/EvalDetail.tsx
@@ -2,11 +2,12 @@ import { useState } from 'react'
 import {
   Alert, Button, Card, Col, Descriptions, Empty, Input, Modal, Popconfirm, Progress, Row, Space, Spin, Tag, message,
 } from 'antd'
-import { FileTextOutlined, StopOutlined } from '@ant-design/icons'
+import { FileTextOutlined, HistoryOutlined, StopOutlined } from '@ant-design/icons'
 import { intelligentEvalsApi, type IntelligentEval } from '../../api'
 import { colors } from '../../tokens'
 import { formatDateTime, shortDateTime } from '../../utils/date'
 import { EVAL_STATUS, SESSION_STATUS } from './status'
+import ConfigSnapshots from './ConfigSnapshots'
 
 const sectionCard: React.CSSProperties = { marginBottom: 16 }
 
@@ -70,6 +71,7 @@ export default function EvalDetail({ ev, targetName, onOpenReport, onChanged }:
   const [busy, setBusy] = useState(false)
   const [rejectOpen, setRejectOpen] = useState(false)
   const [feedback, setFeedback] = useState('')
+  const [showConfigHistory, setShowConfigHistory] = useState(false)
   const meta = EVAL_STATUS[ev.status] ?? { label: ev.status, color: 'default' }
   const showSessions = ev.status === 'executing' || ev.status === 'completed'
   const sessions = showSessions ? ev.sessions ?? [] : []
@@ -93,6 +95,10 @@ export default function EvalDetail({ ev, targetName, onOpenReport, onChanged }:
     setFeedback('')
   }, '已打回，等待重新规划')
 
+  if (showConfigHistory) {
+    return <ConfigSnapshots evalId={ev.id} onBack={() => setShowConfigHistory(false)} />
+  }
+
   return (
     <div style={{ height: '100%', overflowY: 'auto', padding: 16 }}>
       <div style={{ display: 'flex', alignItems: 'center', gap: 8, marginBottom: 12 }}>
@@ -100,6 +106,7 @@ export default function EvalDetail({ ev, targetName, onOpenReport, onChanged }:
         <Tag color={meta.color}>{meta.label}</Tag>
         <div style={{ flex: 1 }} />
         <Space>
+          <Button icon={<HistoryOutlined />} onClick={() => setShowConfigHistory(true)}>配置历史</Button>
           {ev.status === 'completed' && (
             <Button type="primary" icon={<FileTextOutlined />} onClick={onOpenReport}>查看报告</Button>
           )}