diff --git a/mq/scripts/info.py b/mq/scripts/info.py
index a4fa50e..b6482ed 100644
--- a/mq/scripts/info.py
+++ b/mq/scripts/info.py
@@ -1,11 +1,13 @@
 # coding=utf-8
-import json
+import logging
 import redis
 from judge.judger_controller.settings import redis_config
 from judge.judger.result import result
 from submission.models import Submission
 from problem.models import Problem
 
+logger = logging.getLogger("app_info")
+
 
 class MessageQueue(object):
     def __init__(self):
@@ -15,11 +17,11 @@ class MessageQueue(object):
     def listen_task(self):
         while True:
             submission_id = self.conn.blpop(self.queue, 0)[1]
-            print submission_id
+            logger.debug("receive submission_id: " + submission_id)
             try:
                 submission = Submission.objects.get(id=submission_id)
             except Submission.DoesNotExist:
-                print "error 1"
+                logger.warning("Submission does not exist, submission_id: " + submission_id)
                 pass
 
             if submission.result == result["accepted"]:
@@ -29,9 +31,9 @@ class MessageQueue(object):
                     problem.total_accepted_number += 1
                     problem.save()
                 except Problem.DoesNotExist:
-                    print "error 2"
+                    logger.warning("Submission problem does not exist, submission_id: " + submission_id)
                     pass
 
 
-print "mq running"
+logger.debug("Start message queue")
 MessageQueue().listen_task()
diff --git a/oj/settings.py b/oj/settings.py
index ce699b4..5703566 100644
--- a/oj/settings.py
+++ b/oj/settings.py
@@ -148,7 +148,7 @@ LOGGING = {
         }
     },
     'loggers': {
-        'app_info_logger': {
+        'app_info': {
             'handlers': ['app_info', "console"],
             'level': 'DEBUG',
             'propagate': True