diff --git a/smp_coder/mqtt_smp.py b/smp_coder/mqtt_smp.py
index 557dff3..0a7e4f3 100644
--- a/smp_coder/mqtt_smp.py
+++ b/smp_coder/mqtt_smp.py
@@ -16,8 +16,8 @@ def on_connect(client, userdata, flags, rc, properties=None):
 def on_message(client, userdata, msg):
     print("收到消息: " + msg.topic + " " + str(msg.payload))
 
-    if not os.path.exists("user.txt"):
-        with open("user.txt", "a") as f:
+    if not os.path.exists("smp_coder/user.txt"):
+        with open("smp_coder/user.txt", "a") as f:
             f.write(msg.payload.decode("utf-8") + "\n")
     else: