diff --git a/agent/mem0_manager.py b/agent/mem0_manager.py
index 93f30c9..464bc8f 100644
--- a/agent/mem0_manager.py
+++ b/agent/mem0_manager.py
@@ -476,11 +476,19 @@ class Mem0Manager:
             # 获取所有记忆
             memories = mem.get_all(user_id=user_id)
 
-            # 过滤 agent_id
-            filtered_memories = [
-                m for m in memories
-                if m.get("metadata", {}).get("agent_id") == agent_id
-            ]
+            # Mem0 的 get_all 可能返回字符串列表或字典列表，需要统一处理
+            filtered_memories = []
+            for m in memories:
+                # 如果是字符串，跳过（旧版本格式，不包含 metadata）
+                if isinstance(m, str):
+                    logger.warning(f"Memory item is string, skipping: {m[:50]}...")
+                    continue
+
+                # 如果是字典，检查 agent_id
+                if isinstance(m, dict):
+                    metadata = m.get("metadata", {})
+                    if isinstance(metadata, dict) and metadata.get("agent_id") == agent_id:
+                        filtered_memories.append(m)
 
             return filtered_memories
 
@@ -511,11 +519,18 @@ class Mem0Manager:
             memories = mem.get_all(user_id=user_id)
             target_memory = None
             for m in memories:
-                if m.get("id") == memory_id:
-                    # 验证 agent_id 匹配
-                    if m.get("metadata", {}).get("agent_id") == agent_id:
-                        target_memory = m
-                        break
+                # 跳过字符串类型的记忆（旧版本格式）
+                if isinstance(m, str):
+                    continue
+
+                # 只处理字典类型
+                if isinstance(m, dict):
+                    if m.get("id") == memory_id:
+                        # 验证 agent_id 匹配
+                        metadata = m.get("metadata", {})
+                        if isinstance(metadata, dict) and metadata.get("agent_id") == agent_id:
+                            target_memory = m
+                            break
 
             if not target_memory:
                 logger.warning(f"Memory {memory_id} not found or access denied for user={user_id}, agent={agent_id}")
@@ -552,16 +567,24 @@ class Mem0Manager:
             memories = mem.get_all(user_id=user_id)
 
             # 过滤 agent_id 并删除
+            # Mem0 的 get_all 可能返回字符串列表或字典列表，需要统一处理
             deleted_count = 0
             for m in memories:
-                if m.get("metadata", {}).get("agent_id") == agent_id:
-                    memory_id = m.get("id")
-                    if memory_id:
-                        try:
-                            mem.delete(memory_id=memory_id)
-                            deleted_count += 1
-                        except Exception as e:
-                            logger.warning(f"Failed to delete memory {memory_id}: {e}")
+                # 跳过字符串类型的记忆（旧版本格式）
+                if isinstance(m, str):
+                    continue
+
+                # 只处理字典类型
+                if isinstance(m, dict):
+                    metadata = m.get("metadata", {})
+                    if isinstance(metadata, dict) and metadata.get("agent_id") == agent_id:
+                        memory_id = m.get("id")
+                        if memory_id:
+                            try:
+                                mem.delete(memory_id=memory_id)
+                                deleted_count += 1
+                            except Exception as e:
+                                logger.warning(f"Failed to delete memory {memory_id}: {e}")
 
             logger.info(f"Deleted {deleted_count} memories for user={user_id}, agent={agent_id}")
             return deleted_count