diff --git a/metagpt/roles/ml_engineer.py b/metagpt/roles/ml_engineer.py
index f7538ae2e..16ffe69db 100644
--- a/metagpt/roles/ml_engineer.py
+++ b/metagpt/roles/ml_engineer.py
@@ -3,8 +3,7 @@ import json
 from datetime import datetime
 
 import fire
-import nbformat
-from pathlib import Path
+
 
 from metagpt.actions import Action
 from metagpt.actions.debug_code import DebugCode
@@ -27,7 +26,7 @@ from metagpt.roles.kaggle_manager import DownloadData, SubmitResult
 from metagpt.schema import Message, Plan
 from metagpt.utils.common import remove_comments, create_func_config
 from metagpt.utils.save_code import save_code_file
-
+from metagpt.utils.recovery_util import save_history, load_history
 
 class UpdateDataColumns(Action):
     async def run(self, plan: Plan = None) -> dict:
@@ -297,49 +296,8 @@ if __name__ == "__main__":
     save_dir = ""
     # save_dir = DATA_PATH / "output" / "2023-12-14_20-40-34"
     
-    def load_history(save_dir: str = save_dir):
-        """
-        Load history from the specified save directory.
-
-        Args:
-            save_dir (str): The directory from which to load the history.
-
-        Returns:
-            Tuple: A tuple containing the loaded plan and notebook.
-        """
-        
-        plan_path = Path(save_dir) / "plan.json"
-        nb_path = Path(save_dir) / "history_nb" / "code.ipynb"
-        plan = json.load(open(plan_path, "r", encoding="utf-8"))
-        nb = nbformat.read(open(nb_path, "r", encoding="utf-8"), as_version=nbformat.NO_CONVERT)
-        return plan, nb
     
     
-    async def save_history(role: Role = MLEngineer, save_dir: str = save_dir):
-        """
-        Save history to the specified directory.
-
-        Args:
-            role (Role): The role containing the plan and execute_code attributes.
-            save_dir (str): The directory to save the history.
-
-        Returns:
-            Path: The path to the saved history directory.
-        """
-        record_time = datetime.now().strftime('%Y-%m-%d_%H-%M-%S')
-        save_path = DATA_PATH / "output" / f"{record_time}"
-        
-        # overwrite exist trajectory
-        save_path.mkdir(parents=True, exist_ok=True)
-        
-        plan = role.plan.dict()
-        
-        with open(save_path / "plan.json", "w", encoding="utf-8") as plan_file:
-            json.dump(plan, plan_file, indent=4, ensure_ascii=False)
-        
-        save_code_file(name=Path(record_time) / "history_nb", code_context=role.execute_code.nb, file_format="ipynb")
-        return save_path
-    
     
     async def main(requirement: str = requirement, auto_run: bool = True, save_dir: str = save_dir):
         """
@@ -368,7 +326,7 @@ if __name__ == "__main__":
             await role.run(requirement)
         except Exception as e:
             
-            save_path = await save_history(role, save_dir)
+            save_path = save_history(role, save_dir)
             
             logger.exception(f"An error occurred: {e}, save trajectory here: {save_path}")
     
diff --git a/metagpt/utils/recovery_util.py b/metagpt/utils/recovery_util.py
new file mode 100644
index 000000000..ef4f0aca7
--- /dev/null
+++ b/metagpt/utils/recovery_util.py
@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+# @Date    : 12/20/2023 11:07 AM
+# @Author  : stellahong (stellahong@fuzhi.ai)
+# @Desc    :
+import nbformat
+from pathlib import Path
+import json
+from datetime import datetime
+
+from metagpt.roles.role import Role
+from metagpt.roles.ml_engineer import MLEngineer
+from metagpt.const import DATA_PATH
+from metagpt.utils.save_code import save_code_file
+
+def load_history(save_dir: str = ""):
+    """
+    Load history from the specified save directory.
+
+    Args:
+        save_dir (str): The directory from which to load the history.
+
+    Returns:
+        Tuple: A tuple containing the loaded plan and notebook.
+    """
+    
+    plan_path = Path(save_dir) / "plan.json"
+    nb_path = Path(save_dir) / "history_nb" / "code.ipynb"
+    plan = json.load(open(plan_path, "r", encoding="utf-8"))
+    nb = nbformat.read(open(nb_path, "r", encoding="utf-8"), as_version=nbformat.NO_CONVERT)
+    return plan, nb
+
+
+def save_history(role: Role = MLEngineer, save_dir: str = ""):
+    """
+    Save history to the specified directory.
+
+    Args:
+        role (Role): The role containing the plan and execute_code attributes.
+        save_dir (str): The directory to save the history.
+
+    Returns:
+        Path: The path to the saved history directory.
+    """
+    record_time = datetime.now().strftime('%Y-%m-%d_%H-%M-%S')
+    save_path = DATA_PATH / "output" / f"{record_time}"
+    
+    # overwrite exist trajectory
+    save_path.mkdir(parents=True, exist_ok=True)
+    
+    plan = role.plan.dict()
+    
+    with open(save_path / "plan.json", "w", encoding="utf-8") as plan_file:
+        json.dump(plan, plan_file, indent=4, ensure_ascii=False)
+    
+    save_code_file(name=Path(record_time) / "history_nb", code_context=role.execute_code.nb, file_format="ipynb")
+    return save_path
\ No newline at end of file