diff --git a/api/app/cache/memory/__init__.py b/api/app/cache/memory/__init__.py
index 9a7fd225..551062ac 100644
--- a/api/app/cache/memory/__init__.py
+++ b/api/app/cache/memory/__init__.py
@@ -4,7 +4,9 @@ Memory 缓存模块
 提供记忆系统相关的缓存功能
 """
 from .interest_memory import InterestMemoryCache
+from .activity_stats_cache import ActivityStatsCache
 
 __all__ = [
     "InterestMemoryCache",
+    "ActivityStatsCache",
 ]
diff --git a/api/app/cache/memory/activity_stats_cache.py b/api/app/cache/memory/activity_stats_cache.py
new file mode 100644
index 00000000..6b162cdd
--- /dev/null
+++ b/api/app/cache/memory/activity_stats_cache.py
@@ -0,0 +1,124 @@
+"""
+Recent Activity Stats Cache
+
+记忆提取活动统计缓存模块
+用于缓存每次记忆提取流程的统计数据，按 workspace_id 存储，24小时后释放
+查询命令：cache:memory:activity_stats:by_workspace:7de31a97-40a6-4fc0-b8d3-15c89f523843
+"""
+import json
+import logging
+from typing import Optional, Dict, Any
+from datetime import datetime
+
+from app.aioRedis import aio_redis
+
+logger = logging.getLogger(__name__)
+
+# 缓存过期时间：24小时
+ACTIVITY_STATS_CACHE_EXPIRE = 86400
+
+
+class ActivityStatsCache:
+    """记忆提取活动统计缓存类"""
+
+    PREFIX = "cache:memory:activity_stats"
+
+    @classmethod
+    def _get_key(cls, workspace_id: str) -> str:
+        """生成 Redis key
+
+        Args:
+            workspace_id: 工作空间ID
+
+        Returns:
+            完整的 Redis key
+        """
+        return f"{cls.PREFIX}:by_workspace:{workspace_id}"
+
+    @classmethod
+    async def set_activity_stats(
+        cls,
+        workspace_id: str,
+        stats: Dict[str, Any],
+        expire: int = ACTIVITY_STATS_CACHE_EXPIRE,
+    ) -> bool:
+        """设置记忆提取活动统计缓存
+
+        Args:
+            workspace_id: 工作空间ID
+            stats: 统计数据，格式：
+                {
+                    "chunk_count": int,
+                    "statements_count": int,
+                    "triplet_entities_count": int,
+                    "triplet_relations_count": int,
+                    "temporal_count": int,
+                }
+            expire: 过期时间（秒），默认24小时
+
+        Returns:
+            是否设置成功
+        """
+        try:
+            key = cls._get_key(workspace_id)
+            payload = {
+                "stats": stats,
+                "generated_at": datetime.now().isoformat(),
+                "workspace_id": workspace_id,
+                "cached": True,
+            }
+            value = json.dumps(payload, ensure_ascii=False)
+            await aio_redis.set(key, value, ex=expire)
+            logger.info(f"设置活动统计缓存成功: {key}, 过期时间: {expire}秒")
+            return True
+        except Exception as e:
+            logger.error(f"设置活动统计缓存失败: {e}", exc_info=True)
+            return False
+
+    @classmethod
+    async def get_activity_stats(
+        cls,
+        workspace_id: str,
+    ) -> Optional[Dict[str, Any]]:
+        """获取记忆提取活动统计缓存
+
+        Args:
+            workspace_id: 工作空间ID
+
+        Returns:
+            统计数据字典，缓存不存在或已过期返回 None
+        """
+        try:
+            key = cls._get_key(workspace_id)
+            value = await aio_redis.get(key)
+            if value:
+                payload = json.loads(value)
+                logger.info(f"命中活动统计缓存: {key}")
+                return payload
+            logger.info(f"活动统计缓存不存在或已过期: {key}")
+            return None
+        except Exception as e:
+            logger.error(f"获取活动统计缓存失败: {e}", exc_info=True)
+            return None
+
+    @classmethod
+    async def delete_activity_stats(
+        cls,
+        workspace_id: str,
+    ) -> bool:
+        """删除记忆提取活动统计缓存
+
+        Args:
+            workspace_id: 工作空间ID
+
+        Returns:
+            是否删除成功
+        """
+        try:
+            key = cls._get_key(workspace_id)
+            result = await aio_redis.delete(key)
+            logger.info(f"删除活动统计缓存: {key}, 结果: {result}")
+            return result > 0
+        except Exception as e:
+            logger.error(f"删除活动统计缓存失败: {e}", exc_info=True)
+            return False
diff --git a/api/app/controllers/memory_storage_controller.py b/api/app/controllers/memory_storage_controller.py
index ee45fb83..d91dfc36 100644
--- a/api/app/controllers/memory_storage_controller.py
+++ b/api/app/controllers/memory_storage_controller.py
@@ -544,10 +544,11 @@ async def clear_hot_memory_tags_cache(
 @router.get("/analytics/recent_activity_stats", response_model=ApiResponse)
 async def get_recent_activity_stats_api(
     current_user: User = Depends(get_current_user),
-    ) -> dict:
-    api_logger.info("Recent activity stats requested")
+) -> dict:
+    workspace_id = str(current_user.current_workspace_id) if current_user.current_workspace_id else None
+    api_logger.info(f"Recent activity stats requested: workspace_id={workspace_id}")
     try:
-        result = await analytics_recent_activity_stats()
+        result = await analytics_recent_activity_stats(workspace_id=workspace_id)
         return success(data=result, msg="查询成功")
     except Exception as e:
         api_logger.error(f"Recent activity stats failed: {str(e)}")
diff --git a/api/app/core/memory/agent/utils/write_tools.py b/api/app/core/memory/agent/utils/write_tools.py
index 93c6ef6f..22030278 100644
--- a/api/app/core/memory/agent/utils/write_tools.py
+++ b/api/app/core/memory/agent/utils/write_tools.py
@@ -225,5 +225,24 @@ async def write(
     with open(log_file, "a", encoding="utf-8") as f:
         f.write(f"=== Pipeline Run Completed: {timestamp} ===\n\n")
 
+    # 将提取统计写入 Redis，按 workspace_id 存储
+    try:
+        from app.cache.memory.activity_stats_cache import ActivityStatsCache
+
+        stats_to_cache = {
+            "chunk_count": len(all_chunk_nodes) if all_chunk_nodes else 0,
+            "statements_count": len(all_statement_nodes) if all_statement_nodes else 0,
+            "triplet_entities_count": len(all_entity_nodes) if all_entity_nodes else 0,
+            "triplet_relations_count": len(all_entity_entity_edges) if all_entity_entity_edges else 0,
+            "temporal_count": 0,
+        }
+        await ActivityStatsCache.set_activity_stats(
+            workspace_id=str(memory_config.workspace_id),
+            stats=stats_to_cache,
+        )
+        logger.info(f"[WRITE] 活动统计已写入 Redis: workspace_id={memory_config.workspace_id}")
+    except Exception as cache_err:
+        logger.warning(f"[WRITE] 写入活动统计缓存失败（不影响主流程）: {cache_err}", exc_info=True)
+
     logger.info("=== Pipeline Complete ===")
     logger.info(f"Total execution time: {total_time:.2f} seconds")
\ No newline at end of file
diff --git a/api/app/services/memory_storage_service.py b/api/app/services/memory_storage_service.py
index a83d6830..6e7c1ad4 100644
--- a/api/app/services/memory_storage_service.py
+++ b/api/app/services/memory_storage_service.py
@@ -783,8 +783,37 @@ async def analytics_hot_memory_tags(
         await connector.close()
 
 
-async def analytics_recent_activity_stats() -> Dict[str, Any]:
-    stats, _msg = get_recent_activity_stats()
+async def analytics_recent_activity_stats(workspace_id: Optional[str] = None) -> Dict[str, Any]:
+    """获取最近记忆提取活动统计。
+
+    优先从 Redis 缓存读取（按 workspace_id），缓存不存在时降级到日志文件解析。
+
+    Args:
+        workspace_id: 工作空间ID，用于从 Redis 读取对应缓存
+
+    Returns:
+        包含 total、stats、latest_relative、source 的统计字典
+    """
+    stats = None
+    source = "log"
+
+    # 优先从 Redis 读取
+    if workspace_id:
+        try:
+            from app.cache.memory.activity_stats_cache import ActivityStatsCache
+            cached = await ActivityStatsCache.get_activity_stats(workspace_id)
+            if cached:
+                stats = cached.get("stats", {})
+                source = "redis"
+                logger.info(f"[ANALYTICS] 从 Redis 读取活动统计: workspace_id={workspace_id}")
+        except Exception as e:
+            logger.warning(f"[ANALYTICS] 读取 Redis 活动统计失败，降级到日志: {e}")
+
+    # 降级：从日志文件解析
+    if stats is None:
+        stats, _msg = get_recent_activity_stats()
+        source = "log"
+
     total = (
         stats.get("chunk_count", 0)
         + stats.get("statements_count", 0)
@@ -792,26 +821,29 @@ async def analytics_recent_activity_stats() -> Dict[str, Any]:
         + stats.get("triplet_relations_count", 0)
         + stats.get("temporal_count", 0)
     )
-    # 精简：仅提供“最新一次活动多久前”
-    latest_relative = None
-    try:
-        info = stats.get("log_path", "")
-        idx = info.rfind("最新：")
-        if idx != -1:
-            latest_path = info[idx + 3 :].strip()
-            if latest_path and os.path.exists(latest_path):
-                import time
-                diff = max(0.0, time.time() - os.path.getmtime(latest_path))
-                m = int(diff // 60)
-                if m < 1:
-                    latest_relative = "刚刚"
-                elif m < 60:
-                    latest_relative = "一会前"
-                else:
-                    latest_relative = "较早前"
-    except Exception:
-        pass
 
-    data = {"total": total, "stats": stats, "latest_relative": latest_relative}
+    # 计算"最新一次活动多久前"（仅日志来源时有效）
+    latest_relative = None
+    if source == "log":
+        try:
+            info = stats.get("log_path", "")
+            idx = info.rfind("最新：")
+            if idx != -1:
+                latest_path = info[idx + 3:].strip()
+                if latest_path and os.path.exists(latest_path):
+                    import time
+                    diff = max(0.0, time.time() - os.path.getmtime(latest_path))
+                    m = int(diff // 60)
+                    if m < 1:
+                        latest_relative = "刚刚"
+                    elif m < 60:
+                        latest_relative = "一会前"
+                    else:
+                        latest_relative = "较早前"
+        except Exception:
+            pass
+
+    data = {"total": total, "stats": stats, "latest_relative": latest_relative, "source": source}
     return data
 
+
diff --git a/api/app/services/pilot_run_service.py b/api/app/services/pilot_run_service.py
index 4d9cbb5e..5d00d8a5 100644
--- a/api/app/services/pilot_run_service.py
+++ b/api/app/services/pilot_run_service.py
@@ -326,6 +326,25 @@ async def run_pilot_extraction(
 
         logger.info("Pilot run completed: Skipping Neo4j save")
 
+        # 将提取统计写入 Redis，按 workspace_id 存储
+        try:
+            from app.cache.memory.activity_stats_cache import ActivityStatsCache
+
+            stats_to_cache = {
+                "chunk_count": len(chunk_nodes) if chunk_nodes else 0,
+                "statements_count": len(statement_nodes) if statement_nodes else 0,
+                "triplet_entities_count": len(entity_nodes) if entity_nodes else 0,
+                "triplet_relations_count": len(entity_edges) if entity_edges else 0,
+                "temporal_count": 0,  # temporal 数据在日志中，此处暂置0
+            }
+            await ActivityStatsCache.set_activity_stats(
+                workspace_id=str(memory_config.workspace_id),
+                stats=stats_to_cache,
+            )
+            logger.info(f"[PILOT_RUN] 活动统计已写入 Redis: workspace_id={memory_config.workspace_id}")
+        except Exception as cache_err:
+            logger.warning(f"[PILOT_RUN] 写入活动统计缓存失败（不影响主流程）: {cache_err}", exc_info=True)
+
     except Exception as e:
         logger.error(f"Pilot run failed: {e}", exc_info=True)
         raise