diff --git a/erniebot-agent/examples/cv_agent/CV_agent.py b/erniebot-agent/examples/cv_agent/CV_agent.py
index 6a397da70..231619442 100644
--- a/erniebot-agent/examples/cv_agent/CV_agent.py
+++ b/erniebot-agent/examples/cv_agent/CV_agent.py
@@ -2,7 +2,7 @@
 
 from erniebot_agent.agents.functional_agent import FunctionalAgent
 from erniebot_agent.chat_models.erniebot import ERNIEBot
-from erniebot_agent.file_io import (
+from erniebot_agent.file import (
     configure_global_file_manager,
     get_global_file_manager,
 )
@@ -25,7 +25,7 @@ def __init__(self):
 
 
 async def run_agent():
-    file_manager = get_global_file_manager()
+    file_manager = await get_global_file_manager()
     seg_file = await file_manager.create_file_from_path(file_path="cityscapes_demo.png", file_type="local")
     clas_file = await file_manager.create_file_from_path(file_path="class_img.jpg", file_type="local")
     ocr_file = await file_manager.create_file_from_path(file_path="ch.png", file_type="local")
diff --git a/erniebot-agent/examples/plugins/multiple_plugins.py b/erniebot-agent/examples/plugins/multiple_plugins.py
index 29d628813..a64dfbd43 100644
--- a/erniebot-agent/examples/plugins/multiple_plugins.py
+++ b/erniebot-agent/examples/plugins/multiple_plugins.py
@@ -6,9 +6,9 @@
 from erniebot_agent.agents.callback.default import get_no_ellipsis_callback
 from erniebot_agent.agents.functional_agent import FunctionalAgent
 from erniebot_agent.chat_models.erniebot import ERNIEBot
-from erniebot_agent.file_io import get_global_file_manager
+from erniebot_agent.file import get_global_file_manager
 from erniebot_agent.memory.sliding_window_memory import SlidingWindowMemory
-from erniebot_agent.messages import AIMessage, HumanMessage, Message
+from erniebot_agent.memory import AIMessage, HumanMessage, Message
 from erniebot_agent.tools.base import Tool
 from erniebot_agent.tools.calculator_tool import CalculatorTool
 from erniebot_agent.tools.schema import ToolParameterView
@@ -32,7 +32,7 @@ async def __call__(self, input_file_id: str, repeat_times: int) -> Dict[str, Any
         if "<split>" in input_file_id:
             input_file_id = input_file_id.split("<split>")[0]
 
-        file_manager = get_global_file_manager()
+        file_manager = await get_global_file_manager()
         input_file = file_manager.look_up_file_by_id(input_file_id)
         if input_file is None:
             raise RuntimeError("File not found")
@@ -109,20 +109,20 @@ def examples(self) -> List[Message]:
 # TODO(shiyutang): replace this when model is online
 llm = ERNIEBot(model="ernie-3.5", api_type="custom")
 memory = SlidingWindowMemory(max_round=1)
-file_manager = get_global_file_manager()
 # plugins = ["ChatFile", "eChart"]
 plugins: List[str] = []
 agent = FunctionalAgent(
     llm=llm,
     tools=[TextRepeaterTool(), TextRepeaterNoFileTool(), CalculatorTool()],
     memory=memory,
-    file_manager=file_manager,
     callbacks=get_no_ellipsis_callback(),
     plugins=plugins,
 )
 
 
 async def run_agent():
+    file_manager = await get_global_file_manager()
+    
     docx_file = await file_manager.create_file_from_path(
         file_path="浅谈牛奶的营养与消费趋势.docx",
         file_type="remote",
diff --git a/erniebot-agent/examples/rpg_game_agent.py b/erniebot-agent/examples/rpg_game_agent.py
index 2c9aecfba..4a03edc70 100644
--- a/erniebot-agent/examples/rpg_game_agent.py
+++ b/erniebot-agent/examples/rpg_game_agent.py
@@ -24,9 +24,7 @@
 from erniebot_agent.agents.base import Agent
 from erniebot_agent.agents.schema import AgentFile, AgentResponse
 from erniebot_agent.chat_models.erniebot import ERNIEBot
-from erniebot_agent.file_io import get_global_file_manager
-from erniebot_agent.file_io.base import File
-from erniebot_agent.file_io.file_manager import FileManager
+from erniebot_agent.file.base import File
 from erniebot_agent.memory.sliding_window_memory import SlidingWindowMemory
 from erniebot_agent.messages import AIMessage, HumanMessage, SystemMessage
 from erniebot_agent.tools.base import BaseTool
@@ -87,7 +85,6 @@ def __init__(
             tools=tools,
             system_message=system_message,
         )
-        self.file_manager: FileManager = get_global_file_manager()
 
     async def handle_tool(self, tool_name: str, tool_args: str) -> str:
         tool_response = await self._async_run_tool(
diff --git a/erniebot-agent/src/erniebot_agent/agents/base.py b/erniebot-agent/src/erniebot_agent/agents/base.py
index 10646cd7e..623480b5d 100644
--- a/erniebot-agent/src/erniebot_agent/agents/base.py
+++ b/erniebot-agent/src/erniebot_agent/agents/base.py
@@ -76,18 +76,16 @@ def __init__(
             self._callback_manager = callbacks
         else:
             self._callback_manager = CallbackManager(callbacks)
-        if file_manager is None:
-            file_manager = get_global_file_manager()
-        self.plugins = plugins
         self._file_manager = file_manager
+        self._plugins = plugins
         self._init_file_repr()
 
     def _init_file_repr(self):
         self.file_needs_url = False
 
-        if self.plugins:
+        if self._plugins:
             PLUGIN_WO_FILE = ["eChart"]
-            for plugin in self.plugins:
+            for plugin in self._plugins:
                 if plugin not in PLUGIN_WO_FILE:
                     self.file_needs_url = True
 
@@ -175,12 +173,8 @@ async def _sniff_and_extract_files_from_args(
         for val in args.values():
             if isinstance(val, str):
                 if protocol.is_file_id(val):
-                    if self._file_manager is None:
-                        logger.warning(
-                            f"A file is used by {repr(tool)}, but the agent has no file manager to fetch it."
-                        )
-                        continue
-                    file = self._file_manager.look_up_file_by_id(val)
+                    file_manager = await self._get_file_manager()
+                    file = file_manager.look_up_file_by_id(val)
                     if file is None:
                         raise RuntimeError(f"Unregistered file with ID {repr(val)} is used by {repr(tool)}.")
                     agent_files.append(AgentFile(file=file, type=file_type, used_by=tool.tool_name))
@@ -190,3 +184,10 @@ async def _sniff_and_extract_files_from_args(
                 for item in val:
                     agent_files.extend(await self._sniff_and_extract_files_from_args(item, tool, file_type))
         return agent_files
+
+    async def _get_file_manager(self) -> FileManager:
+        if self._file_manager is None:
+            file_manager = await get_global_file_manager()
+        else:
+            file_manager = self._file_manager
+        return file_manager
diff --git a/erniebot-agent/src/erniebot_agent/file/global_file_manager.py b/erniebot-agent/src/erniebot_agent/file/global_file_manager.py
index eb20814e3..4b17c834f 100644
--- a/erniebot-agent/src/erniebot_agent/file/global_file_manager.py
+++ b/erniebot-agent/src/erniebot_agent/file/global_file_manager.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import asyncio
 from typing import Any, Optional
 
 import asyncio_atexit  # type: ignore
@@ -21,12 +22,14 @@
 from erniebot_agent.utils import config_from_environ as C
 
 _global_file_manager: Optional[FileManager] = None
+_lock = asyncio.Lock()
 
 
 async def get_global_file_manager() -> FileManager:
     global _global_file_manager
-    if _global_file_manager is None:
-        _global_file_manager = await _create_default_file_manager(access_token=None, save_dir=None)
+    async with _lock:
+        if _global_file_manager is None:
+            _global_file_manager = await _create_default_file_manager(access_token=None, save_dir=None)
     return _global_file_manager
 
 
@@ -34,11 +37,12 @@ async def configure_global_file_manager(
     access_token: Optional[str] = None, save_dir: Optional[str] = None, **opts: Any
 ) -> None:
     global _global_file_manager
-    if _global_file_manager is not None:
-        raise RuntimeError(
-            "The global file manager can only be configured once before calling `get_global_file_manager`."
-        )
-    _global_file_manager = await _create_default_file_manager(access_token=access_token, save_dir=save_dir, **opts)
+    async with _lock:
+        if _global_file_manager is not None:
+            raise RuntimeError(
+                "The global file manager can only be configured once before calling `get_global_file_manager`."
+            )
+        _global_file_manager = await _create_default_file_manager(access_token=access_token, save_dir=save_dir, **opts)
 
 
 async def _create_default_file_manager(
diff --git a/erniebot-agent/src/erniebot_agent/tools/remote_tool.py b/erniebot-agent/src/erniebot_agent/tools/remote_tool.py
index ef3ab1a8d..06b387ce6 100644
--- a/erniebot-agent/src/erniebot_agent/tools/remote_tool.py
+++ b/erniebot-agent/src/erniebot_agent/tools/remote_tool.py
@@ -4,6 +4,7 @@
 import json
 from copy import deepcopy
 from typing import Any, Dict, List, Optional, Type
+from erniebot_agent.file import get_global_file_manager
 
 import requests
 
@@ -45,7 +46,7 @@ def __init__(
         server_url: str,
         headers: dict,
         version: str,
-        file_manager: FileManager,
+        file_manager: Optional[FileManager],
         examples: Optional[List[Message]] = None,
         tool_name_prefix: Optional[str] = None,
     ) -> None:
@@ -86,11 +87,13 @@ async def fileid_to_byte(file_id, file_manager):
 
         async def convert_to_file_data(file_data: str, format: str):
             value = file_data.replace("<file>", "").replace("</file>", "")
-            byte_value = await fileid_to_byte(value, self.file_manager)
+            byte_value = await fileid_to_byte(value, file_manager)
             if format == "byte":
                 byte_value = base64.b64encode(byte_value).decode()
             return byte_value
 
+        file_manager = await self._get_file_manager()
+
         # 1. replace fileid with byte string
         parameter_file_info = get_file_info_from_param_view(self.tool_view.parameters)
         for key in tool_arguments.keys():
@@ -203,19 +206,21 @@ async def send_request(self, tool_arguments: Dict[str, Any]) -> dict:
         if len(returns_file_infos) == 0 and is_json_response(response):
             return response.json()
 
+        file_manager = await self._get_file_manager()
+
         file_metadata = {"tool_name": self.tool_name}
         if is_json_response(response) and len(returns_file_infos) > 0:
             response_json = response.json()
             file_info = await parse_file_from_json_response(
                 response_json,
-                file_manager=self.file_manager,
+                file_manager=file_manager,
                 param_view=self.tool_view.returns,  # type: ignore
                 tool_name=self.tool_name,
             )
             response_json.update(file_info)
             return response_json
         file = await parse_file_from_response(
-            response, self.file_manager, file_infos=returns_file_infos, file_metadata=file_metadata
+            response, file_manager, file_infos=returns_file_infos, file_metadata=file_metadata
         )
 
         if file is not None:
@@ -293,6 +298,13 @@ def __adhoc_post_process__(self, tool_response: dict) -> dict:
                             result.pop(key)
         return tool_response
 
+    async def _get_file_manager(self) -> FileManager:
+        if self.file_manager is None:
+            file_manager = await get_global_file_manager()
+        else:
+            file_manager = self.file_manager
+        return file_manager
+
 
 class RemoteToolRegistor:
     def __init__(self) -> None:
diff --git a/erniebot-agent/src/erniebot_agent/tools/remote_toolkit.py b/erniebot-agent/src/erniebot_agent/tools/remote_toolkit.py
index 62cdbf8b3..94f7e60c1 100644
--- a/erniebot-agent/src/erniebot_agent/tools/remote_toolkit.py
+++ b/erniebot-agent/src/erniebot_agent/tools/remote_toolkit.py
@@ -12,7 +12,6 @@
 from openapi_spec_validator.readers import read_from_filename
 from yaml import safe_dump
 
-from erniebot_agent.file import get_global_file_manager
 from erniebot_agent.file.file_manager import FileManager
 from erniebot_agent.memory.messages import (
     AIMessage,
@@ -201,9 +200,6 @@ def from_openapi_dict(
                     )
                 )
 
-        if file_manager is None:
-            file_manager = get_global_file_manager()
-
         return RemoteToolkit(
             openapi=openapi_dict["openapi"],
             info=info,
diff --git a/erniebot-agent/tests/integration_tests/apihub/test_pp_shituv2.py b/erniebot-agent/tests/integration_tests/apihub/test_pp_shituv2.py
index bdf8262dd..d57373e86 100644
--- a/erniebot-agent/tests/integration_tests/apihub/test_pp_shituv2.py
+++ b/erniebot-agent/tests/integration_tests/apihub/test_pp_shituv2.py
@@ -1,8 +1,8 @@
 from __future__ import annotations
+from erniebot_agent.file.file_manager import FileManager
 
 import pytest
 
-from erniebot_agent.file_io import get_global_file_manager
 from erniebot_agent.tools import RemoteToolkit
 
 from .base import RemoteToolTesting
@@ -17,13 +17,13 @@ async def test_pp_shituv2(self):
 
         agent = self.get_agent(toolkit)
 
-        file_manager = get_global_file_manager()
-        file_path = self.download_file(
-            "https://paddlenlp.bj.bcebos.com/ebagent/ci/fixtures/remote-tools/pp_shituv2_input_img.png"
-        )
-        file = await file_manager.create_file_from_path(file_path)
+        async with FileManager() as file_manager:
+            file_path = self.download_file(
+                "https://paddlenlp.bj.bcebos.com/ebagent/ci/fixtures/remote-tools/pp_shituv2_input_img.png"
+            )
+            file = await file_manager.create_file_from_path(file_path)
 
-        result = await agent.async_run("对这张图片进行通用识别，包含的文件为：", files=[file])
-        self.assertEqual(len(result.files), 2)
-        self.assertEqual(len(result.actions), 1)
-        self.assertIn("file-", result.text)
+            result = await agent.async_run("对这张图片进行通用识别，包含的文件为：", files=[file])
+            self.assertEqual(len(result.files), 2)
+            self.assertEqual(len(result.actions), 1)
+            self.assertIn("file-", result.text)