diff --git a/aliyun-java-sdk-core/src/main/java/com/aliyuncs/http/clients/ApacheHttpClient.java b/aliyun-java-sdk-core/src/main/java/com/aliyuncs/http/clients/ApacheHttpClient.java
index 9c59f1d95d..917f4f176e 100644
--- a/aliyun-java-sdk-core/src/main/java/com/aliyuncs/http/clients/ApacheHttpClient.java
+++ b/aliyun-java-sdk-core/src/main/java/com/aliyuncs/http/clients/ApacheHttpClient.java
@@ -2,7 +2,7 @@
 
 import com.aliyuncs.exceptions.ClientException;
 import com.aliyuncs.http.*;
-import com.aliyuncs.utils.EnvironmentUtils;
+import com.aliyuncs.utils.EnvHelper;
 import com.aliyuncs.utils.IOUtils;
 import com.aliyuncs.utils.StringUtils;
 import org.apache.http.Header;
@@ -271,16 +271,16 @@ private HttpUriRequest parseToHttpRequest(HttpRequest apiReq) throws IOException
     }
 
     private HttpHost calcProxy(HttpRequest apiReq) throws MalformedURLException, ClientException {
-        boolean needProxy = HttpUtil.needProxy(new URL(apiReq.getSysUrl()).getHost(), clientConfig.getNoProxy(), EnvironmentUtils.getNoProxy());
+        boolean needProxy = HttpUtil.needProxy(new URL(apiReq.getSysUrl()).getHost(), clientConfig.getNoProxy(), EnvHelper.getenv("NO_PROXY"));
         if (!needProxy) {
             return null;
         }
         URL url = new URL(apiReq.getSysUrl());
         HttpHost proxy = null;
         if ("https".equalsIgnoreCase(url.getProtocol())) {
-            proxy = HttpUtil.getApacheProxy(clientConfig.getHttpsProxy(), EnvironmentUtils.getHttpsProxy(), apiReq);
+            proxy = HttpUtil.getApacheProxy(clientConfig.getHttpsProxy(), EnvHelper.getenv("HTTPS_PROXY"), apiReq);
         } else {
-            proxy = HttpUtil.getApacheProxy(clientConfig.getHttpProxy(), EnvironmentUtils.getHttpProxy(), apiReq);
+            proxy = HttpUtil.getApacheProxy(clientConfig.getHttpProxy(), EnvHelper.getenv("HTTP_PROXY"), apiReq);
         }
         return proxy;
     }
diff --git a/aliyun-java-sdk-core/src/main/java/com/aliyuncs/http/clients/CompatibleUrlConnClient.java b/aliyun-java-sdk-core/src/main/java/com/aliyuncs/http/clients/CompatibleUrlConnClient.java
index d51356156b..f9095eb969 100644
--- a/aliyun-java-sdk-core/src/main/java/com/aliyuncs/http/clients/CompatibleUrlConnClient.java
+++ b/aliyun-java-sdk-core/src/main/java/com/aliyuncs/http/clients/CompatibleUrlConnClient.java
@@ -2,7 +2,7 @@
 
 import com.aliyuncs.exceptions.ClientException;
 import com.aliyuncs.http.*;
-import com.aliyuncs.utils.EnvironmentUtils;
+import com.aliyuncs.utils.EnvHelper;
 import org.apache.http.conn.ssl.DefaultHostnameVerifier;
 import org.apache.http.conn.ssl.NoopHostnameVerifier;
 
@@ -169,16 +169,16 @@ private void checkHttpRequest(HttpRequest request) {
 
     private Proxy calcProxy(URL url, HttpRequest request) throws ClientException {
         String targetHost = url.getHost();
-        boolean needProxy = HttpUtil.needProxy(targetHost, clientConfig.getNoProxy(), EnvironmentUtils.getNoProxy());
+        boolean needProxy = HttpUtil.needProxy(targetHost, clientConfig.getNoProxy(), EnvHelper.getenv("NO_PROXY"));
         if (!needProxy) {
             return Proxy.NO_PROXY;
         }
         Proxy proxy;
         if ("https".equalsIgnoreCase(url.getProtocol())) {
-            String httpsProxy = EnvironmentUtils.getHttpsProxy();
+            String httpsProxy = EnvHelper.getenv("HTTPS_PROXY");
             proxy = HttpUtil.getJDKProxy(clientConfig.getHttpsProxy(), httpsProxy, request);
         } else {
-            String httpProxy = EnvironmentUtils.getHttpProxy();
+            String httpProxy = EnvHelper.getenv("HTTP_PROXY");
             proxy = HttpUtil.getJDKProxy(clientConfig.getHttpProxy(), httpProxy, request);
         }
         return proxy;
diff --git a/aliyun-java-sdk-core/src/main/java/com/aliyuncs/utils/EnvironmentUtils.java b/aliyun-java-sdk-core/src/main/java/com/aliyuncs/utils/EnvironmentUtils.java
deleted file mode 100644
index c31d02be66..0000000000
--- a/aliyun-java-sdk-core/src/main/java/com/aliyuncs/utils/EnvironmentUtils.java
+++ /dev/null
@@ -1,48 +0,0 @@
-package com.aliyuncs.utils;
-
-public class EnvironmentUtils {
-
-    private static volatile String httpProxy;
-    private static volatile String httpsProxy;
-    private static volatile String noProxy;
-
-    public static String getHttpProxy() {
-        if (null == httpProxy) {
-            String proxy0 = System.getenv("HTTP_PROXY");
-            String proxy1 = System.getenv("http_proxy");
-            return (!StringUtils.isEmpty(proxy0) ? proxy0 : proxy1);
-        } else {
-            return httpProxy;
-        }
-    }
-
-    public static void setHttpProxy(String httpProxy) {
-        EnvironmentUtils.httpProxy = httpProxy;
-    }
-
-    public static String getHttpsProxy() {
-        if (null == httpsProxy) {
-            return System.getenv("HTTPS_PROXY");
-        } else {
-            return httpsProxy;
-        }
-    }
-
-    public static void setHttpsProxy(String httpsProxy) {
-        EnvironmentUtils.httpsProxy = httpsProxy;
-    }
-
-
-    public static String getNoProxy() {
-        if (null == noProxy) {
-            return System.getenv("NO_PROXY");
-        } else {
-            return noProxy;
-        }
-    }
-
-    public static void setNoProxy(String noProxy) {
-        EnvironmentUtils.noProxy = noProxy;
-    }
-
-}
diff --git a/aliyun-java-sdk-core/src/test/java/com/aliyuncs/auth/EnvironmentVariableCredentialsProviderTest.java b/aliyun-java-sdk-core/src/test/java/com/aliyuncs/auth/EnvironmentVariableCredentialsProviderTest.java
index 2e4962be96..c87536155b 100644
--- a/aliyun-java-sdk-core/src/test/java/com/aliyuncs/auth/EnvironmentVariableCredentialsProviderTest.java
+++ b/aliyun-java-sdk-core/src/test/java/com/aliyuncs/auth/EnvironmentVariableCredentialsProviderTest.java
@@ -3,7 +3,6 @@
 import com.aliyuncs.exceptions.ClientException;
 import com.aliyuncs.utils.AuthUtils;
 import com.aliyuncs.utils.EnvHelper;
-import com.aliyuncs.utils.EnvironmentUtils;
 
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/aliyun-java-sdk-core/src/test/java/com/aliyuncs/utils/EnvironmentUtilsTest.java b/aliyun-java-sdk-core/src/test/java/com/aliyuncs/utils/EnvironmentUtilsTest.java
deleted file mode 100644
index 45efa41988..0000000000
--- a/aliyun-java-sdk-core/src/test/java/com/aliyuncs/utils/EnvironmentUtilsTest.java
+++ /dev/null
@@ -1,33 +0,0 @@
-package com.aliyuncs.utils;
-
-import org.junit.Assert;
-import org.junit.Test;
-
-public class EnvironmentUtilsTest {
-
-    @Test
-    public void testConstructor() {
-        Assert.assertNotNull(new EnvironmentUtils());
-    }
-
-    @Test
-    public void testGetSetHttpProxy() {
-        Assert.assertNull(EnvironmentUtils.getHttpProxy());
-        EnvironmentUtils.setHttpProxy("http://www.aliyun.com");
-        Assert.assertEquals("http://www.aliyun.com", EnvironmentUtils.getHttpProxy());
-    }
-
-    @Test
-    public void testGetSetHttpsProxy() {
-        Assert.assertNull(EnvironmentUtils.getHttpsProxy());
-        EnvironmentUtils.setHttpsProxy("https://www.aliyun.com");
-        Assert.assertEquals("https://www.aliyun.com", EnvironmentUtils.getHttpsProxy());
-    }
-
-    @Test
-    public void testGetSetNoProxy() {
-        Assert.assertNull(EnvironmentUtils.getNoProxy());
-        EnvironmentUtils.setNoProxy("https://www.aliyun.com");
-        Assert.assertEquals("https://www.aliyun.com", EnvironmentUtils.getNoProxy());
-    }
-}