diff --git a/pkg/platform/botmgr.py b/pkg/platform/botmgr.py
index ee9bd040..eb708d9b 100644
--- a/pkg/platform/botmgr.py
+++ b/pkg/platform/botmgr.py
@@ -157,6 +157,9 @@ class PlatformManager:
         self.adapter_dict = {}
 
     async def initialize(self):
+        # delete all bot log images
+        await self.ap.storage_mgr.storage_provider.delete_dir_recursive('bot_log_images')
+
         self.adapter_components = self.ap.discover.get_components_by_kind('MessagePlatformAdapter')
         adapter_dict: dict[str, type[abstract_platform_adapter.AbstractMessagePlatformAdapter]] = {}
         for component in self.adapter_components:
diff --git a/pkg/platform/logger.py b/pkg/platform/logger.py
index 05fce394..68164865 100644
--- a/pkg/platform/logger.py
+++ b/pkg/platform/logger.py
@@ -149,7 +149,7 @@ class EventLogger(abstract_platform_event_logger.AbstractEventLogger):
                 extension = mimetypes.guess_extension(mime_type)
                 if extension is None:
                     extension = '.jpg'
-                image_key = f'{message_session_id}-{uuid.uuid4()}{extension}'
+                image_key = f'bot_log_images/{message_session_id}-{uuid.uuid4()}{extension}'
                 await self.ap.storage_mgr.storage_provider.save(image_key, img_bytes)
                 image_keys.append(image_key)
 
diff --git a/pkg/storage/provider.py b/pkg/storage/provider.py
index 0111c617..09d8d93e 100644
--- a/pkg/storage/provider.py
+++ b/pkg/storage/provider.py
@@ -42,3 +42,10 @@ class StorageProvider(abc.ABC):
         key: str,
     ):
         pass
+
+    @abc.abstractmethod
+    async def delete_dir_recursive(
+        self,
+        dir_path: str,
+    ):
+        pass
diff --git a/pkg/storage/providers/localstorage.py b/pkg/storage/providers/localstorage.py
index 84ce8a0b..d21f5427 100644
--- a/pkg/storage/providers/localstorage.py
+++ b/pkg/storage/providers/localstorage.py
@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import os
 import aiofiles
+import shutil
 
 from ...core import app
 
@@ -22,6 +23,8 @@ class LocalStorageProvider(provider.StorageProvider):
         key: str,
         value: bytes,
     ):
+        if not os.path.exists(os.path.join(LOCAL_STORAGE_PATH, os.path.dirname(key))):
+            os.makedirs(os.path.join(LOCAL_STORAGE_PATH, os.path.dirname(key)))
         async with aiofiles.open(os.path.join(LOCAL_STORAGE_PATH, f'{key}'), 'wb') as f:
             await f.write(value)
 
@@ -43,3 +46,11 @@ class LocalStorageProvider(provider.StorageProvider):
         key: str,
     ):
         os.remove(os.path.join(LOCAL_STORAGE_PATH, f'{key}'))
+
+    async def delete_dir_recursive(
+        self,
+        dir_path: str,
+    ):
+        # 直接删除整个目录
+        if os.path.exists(os.path.join(LOCAL_STORAGE_PATH, dir_path)):
+            shutil.rmtree(os.path.join(LOCAL_STORAGE_PATH, dir_path))