diff --git a/Basis/Constant.py b/Basis/Constant.py
index 72c3b55..9ffbc7f 100644
--- a/Basis/Constant.py
+++ b/Basis/Constant.py
@@ -1,6 +1,9 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
+import os
+import yaml
+
 # Global Options
 Version = 'dev'
 
@@ -17,6 +20,26 @@ TestHost = 'proxyc.net'
 TestSite = 'www.bing.com'
 PathEnv = '/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin'
 
+# Load Env Options
+yamlFile = os.path.join(os.path.dirname(os.path.realpath(__file__)), '../env.yaml')
+yamlContent = open(yamlFile, 'r', encoding = 'utf-8').read()
+envOptions = yaml.load(yamlContent, Loader = yaml.FullLoader)
+if 'version' in envOptions:
+    Version = envOptions['version']
+if 'loglevel' in envOptions:
+    LogLevel = envOptions['loglevel']
+if 'dir' in envOptions:
+    WorkDir = envOptions['dir']
+if 'dns' in envOptions:
+    DnsServer = envOptions['dns']
+if 'api' in envOptions:
+    if 'port' in envOptions['api']:
+        ApiPort = envOptions['api']['port']
+    if 'path' in envOptions['api']:
+        ApiPath = envOptions['api']['path']
+    if 'token' in envOptions['api']:
+        ApiToken = envOptions['api']['token']
+
 # Shadowsocks Info
 mbedtlsMethods = [
     'aes-128-cfb128',
diff --git a/Dockerfile b/Dockerfile
index 699f252..e3aa413 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -31,7 +31,7 @@ FROM ${PYTHON_IMG} AS wheels
 WORKDIR /wheels/
 RUN apk add linux-headers
 COPY --from=build-base /apk/ /apk/
-RUN /apk/build-base && pip wheel colorlog flask IPy psutil pysocks requests salsa20
+RUN /apk/build-base && pip wheel colorlog flask IPy psutil pysocks pyyaml requests salsa20
 COPY --from=gevent /wheels/*.whl /wheels/
 COPY --from=numpy /wheels/*.whl /wheels/
 
diff --git a/env.yaml b/env.yaml
new file mode 100644
index 0000000..7432cd0
--- /dev/null
+++ b/env.yaml
@@ -0,0 +1,10 @@
+version: 'v0.1'
+loglevel: 'INFO'
+dir: '/tmp/ProxyC'
+dns:
+  - 223.5.5.5
+  - 119.29.29.29
+api:
+  port: 17839
+  path: '/v1'
+  token: 'dnomd343'
diff --git a/main.py b/main.py
index 4d5384e..80fc9fd 100755
--- a/main.py
+++ b/main.py
@@ -13,7 +13,7 @@ from Basis import Constant
 def mainArgParse(rawArgs: list) -> argparse.Namespace:
     mainParser = argparse.ArgumentParser(description = 'Start running API server')
     mainParser.add_argument('--log', type = str, default = Constant.LogLevel, help = 'output log level')
-    mainParser.add_argument('--dns', type = str, nargs = '+', help = 'specify dns server')
+    mainParser.add_argument('--dns', type = str, default = Constant.DnsServer, nargs = '+', help = 'specify dns server')
     mainParser.add_argument('--port', type = int, default = Constant.ApiPort, help = 'port for running')
     mainParser.add_argument('--path', type = str, default = Constant.ApiPath, help = 'root path for api server')
     mainParser.add_argument('--token', type = str, default = Constant.ApiToken, help = 'token for api server')