diff --git a/.gitignore b/.gitignore
index 9b62ce0..1056747 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,6 +27,7 @@ share/python-wheels/
 *.egg
 MANIFEST
 bot
+bot.log
 
 # PyInstaller
 #  Usually these files are written by a python script from a template
diff --git a/ask_gpt.py b/ask_gpt.py
index 2c2ce2b..2edb302 100644
--- a/ask_gpt.py
+++ b/ask_gpt.py
@@ -1,6 +1,8 @@
 import aiohttp
 import asyncio
 import json
+from log import getlogger
+logger = getlogger()
 
 
 async def ask(prompt: str, api_endpoint: str, headers: dict) -> str:
@@ -21,6 +23,8 @@ async def ask(prompt: str, api_endpoint: str, headers: dict) -> str:
                                         json=jsons, headers=headers, timeout=10) as response:
                     status_code = response.status
                     if not status_code == 200:
+                        # print failed reason
+                        logger.warning(str(response.reason))
                         max_try = max_try - 1
                         # wait 2s
                         await asyncio.sleep(2)
@@ -30,5 +34,6 @@ async def ask(prompt: str, api_endpoint: str, headers: dict) -> str:
                     await session.close()
                     return json.loads(resp)['choices'][0]['message']['content']
             except Exception as e:
+                logger.error("Error Exception", exc_info=True)
                 print(e)
                 pass
diff --git a/bot.py b/bot.py
index 3cbd0fe..31d3db1 100644
--- a/bot.py
+++ b/bot.py
@@ -8,7 +8,7 @@ from nio.store.database import SqliteStore
 from ask_gpt import ask
 from send_message import send_room_message
 from v3 import Chatbot
-
+from log import getlogger
 """
 free api_endpoint from https://github.com/ayaka14732/ChatGPTAPIFree
 """
@@ -16,6 +16,7 @@ api_endpoint_list = {
     "free": "https://chatgpt-api.shn.hk/v1/",
     "paid": "https://api.openai.com/v1/chat/completions"
 }
+logger = getlogger()
 
 
 class Bot:
@@ -62,6 +63,12 @@ class Bot:
 
     # message_callback event
     async def message_callback(self, room: MatrixRoom, event: RoomMessageText) -> None:
+        # print info to console
+        print(
+            f"Message received in room {room.display_name}\n"
+            f"{room.user_name(event.sender)} | {event.body}"
+        )
+
         # remove newline character from event.body
         event.body = re.sub("\r\n|\r|\n", " ", event.body)
         if self.room_id == '':
@@ -81,9 +88,11 @@ class Bot:
                     text = text.strip()
                     await send_room_message(self.client, room_id, send_text=text)
                 except Exception as e:
+                    logger.error("Error", exc_info=True)
                     print(f"Error: {e}")
                     pass
             else:
+                logger.warning("No API_KEY provided")
                 await send_room_message(self.client, room_id, send_text="API_KEY not provided")
 
         m = self.gpt_prog.match(event.body)
@@ -95,16 +104,12 @@ class Bot:
                 # 默认等待30s
                 text = await asyncio.wait_for(ask(prompt, self.api_endpoint, self.headers), timeout=30)
             except TimeoutError:
-                text = "出错了，任务超时"
+                logger.error("timeoutException", exc_info=True)
+                text = "Timeout error"
 
             text = text.strip()
             await send_room_message(self.client, room_id, send_text=text)
 
-        # print info to console
-        # print(
-        #     f"Message received in room {room.display_name}\n"
-        #     f"{room.user_name(event.sender)} | {event.body}"
-        # )
     # bot login
     async def login(self) -> None:
         resp = await self.client.login(password=self.password)
diff --git a/log.py b/log.py
new file mode 100644
index 0000000..eb66833
--- /dev/null
+++ b/log.py
@@ -0,0 +1,26 @@
+import logging
+
+
+def getlogger():
+    # create a custom logger
+    logger = logging.getLogger(__name__)
+
+    # create handlers
+    warn_handler = logging.StreamHandler()
+    error_handler = logging.FileHandler('bot.log', mode='a')
+    warn_handler.setLevel(logging.WARNING)
+    error_handler.setLevel(logging.ERROR)
+
+    # create formatters
+    warn_format = logging.Formatter('%(name)s - %(funcName)s - %(levelname)s - %(message)s')
+    error_format = logging.Formatter('%(asctime)s - %(name)s - %(funcName)s - %(levelname)s - %(message)s')
+
+    # set formatter
+    warn_handler.setFormatter(warn_format)
+    error_handler.setFormatter(error_format)
+
+    # add handlers to logger
+    logger.addHandler(warn_handler)
+    logger.addHandler(error_handler)
+
+    return logger
diff --git a/main.py b/main.py
index c20d7bc..448bf1e 100644
--- a/main.py
+++ b/main.py
@@ -19,6 +19,7 @@ async def main():
 
 
 if __name__ == "__main__":
+    print("matrix chatgpt bot start.....")
     try:
         loop = asyncio.get_running_loop()
     except RuntimeError: