diff --git a/BookingService/settings.py b/BookingService/settings.py
index c5e6b08..9bcbb0d 100644
--- a/BookingService/settings.py
+++ b/BookingService/settings.py
@@ -12,6 +12,9 @@ https://docs.djangoproject.com/en/2.1/ref/settings/
 
 import os
 
+# Tell which environment
+ENV = os.environ.get('ENV')
+
 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 
@@ -22,9 +25,9 @@ BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 SECRET_KEY = 'l%o*o21h_a5^f+3xblzzfch*&2k_4pcak(o#t2@vymeb_mcy3$'
 
 # SECURITY WARNING: don't run with debug turned on in production!
-DEBUG = True
+DEBUG = ENV == 'DEV'
 
-ALLOWED_HOSTS = []
+ALLOWED_HOSTS = [] if DEBUG else ['127.0.0.1', 'localhost', 'code.wh.sdu.edu.cn']
 
 # Application definition
 
@@ -82,6 +85,15 @@ DATABASES = {
         'ENGINE': 'django.db.backends.sqlite3',
         'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
     }
+} if DEBUG else {
+    'default': {
+        'ENGINE': 'django.db.backends.postgresql',
+        'NAME': 'bookingservice',
+        'USER': 'postgres',
+        'PASSWORD': 'sduwhsduwh',
+        'HOST': '172.17.0.1',
+        'PORT': '5432',
+    }
 }
 
 # Password validation
@@ -155,6 +167,14 @@ SESSION_COOKIE_HTTPONLY = False
 APPEND_SLASH = True
 
 # CELERY
-CELERY_BROKER_URL = 'amqp://guest:guest@davidz.cn'
+CELERY_BROKER_URL = 'amqp://guest:guest@davidz.cn' if DEBUG else 'amqp://guest:guest@172.17.0.1'
 
 CELERY_TIMEZONE = 'Asia/Shanghai'
+
+if not DEBUG:
+    SECURE_SSL_REDIRECT = True
+
+    # lower version of chrome and edge do not support same-site flag
+    SESSION_COOKIE_SAMESITE = None
+
+    CSRF_COOKIE_SAMESITE = None
diff --git a/BookingService/settings_production.py b/BookingService/settings_production.py
deleted file mode 100644
index 6dc13bd..0000000
--- a/BookingService/settings_production.py
+++ /dev/null
@@ -1,23 +0,0 @@
-from .settings import *
-
-DEBUG = False
-
-ALLOWED_HOSTS = ['127.0.0.1', 'localhost', 'code.wh.sdu.edu.cn']
-
-SECURE_SSL_REDIRECT = True
-
-# lower version of chrome and edge do not support same-site flag
-SESSION_COOKIE_SAMESITE = None
-
-CSRF_COOKIE_SAMESITE = None
-
-DATABASES = {
-    'default': {
-        'ENGINE': 'django.db.backends.postgresql',
-        'NAME': 'bookingservice',
-        'USER': 'postgres',
-        'PASSWORD': 'sduwhsduwh',
-        'HOST': '172.17.0.1',
-        'PORT': '5432',
-    }
-}
diff --git a/BookingService/wsgi.py b/BookingService/wsgi.py
index a3ce3d9..2c3bc68 100644
--- a/BookingService/wsgi.py
+++ b/BookingService/wsgi.py
@@ -11,6 +11,6 @@ import os
 
 from django.core.wsgi import get_wsgi_application
 
-os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'BookingService.settings_production')
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'BookingService.settings')
 
 application = get_wsgi_application()