diff --git a/server/api-service/lowcoder-plugins/graphqlPlugin/src/main/java/org/lowcoder/plugin/graphql/GraphQLExecutor.java b/server/api-service/lowcoder-plugins/graphqlPlugin/src/main/java/org/lowcoder/plugin/graphql/GraphQLExecutor.java
index bd19bb67a..fdfb540ac 100644
--- a/server/api-service/lowcoder-plugins/graphqlPlugin/src/main/java/org/lowcoder/plugin/graphql/GraphQLExecutor.java
+++ b/server/api-service/lowcoder-plugins/graphqlPlugin/src/main/java/org/lowcoder/plugin/graphql/GraphQLExecutor.java
@@ -244,6 +244,7 @@ public Mono<QueryExecutionResult> executeQuery(Object o, GraphQLQueryExecutionCo
                 .then(Mono.defer(() -> {
                     URI uri = RestApiUriBuilder.buildUri(context.getUrl(), new HashMap<>(), context.getUrlParams());
                     WebClient.Builder webClientBuilder = WebClientBuildHelper.builder()
+                            .systemProxy()
                             .disallowedHosts(commonConfig.getDisallowedHosts())
                             .toWebClientBuilder();
 
diff --git a/server/api-service/lowcoder-plugins/restApiPlugin/src/main/java/org/lowcoder/plugin/restapi/RestApiExecutor.java b/server/api-service/lowcoder-plugins/restApiPlugin/src/main/java/org/lowcoder/plugin/restapi/RestApiExecutor.java
index fdb5d4736..c5352c2fe 100644
--- a/server/api-service/lowcoder-plugins/restApiPlugin/src/main/java/org/lowcoder/plugin/restapi/RestApiExecutor.java
+++ b/server/api-service/lowcoder-plugins/restApiPlugin/src/main/java/org/lowcoder/plugin/restapi/RestApiExecutor.java
@@ -218,6 +218,7 @@ public Mono<QueryExecutionResult> executeQuery(Object webClientFilter, RestApiQu
         return Mono.defer(() -> authByOauth2InheritFromLogin(context))
                 .then(Mono.defer(() -> {
                     WebClient.Builder webClientBuilder = WebClientBuildHelper.builder()
+                            .systemProxy()
                             .disallowedHosts(commonConfig.getDisallowedHosts())
                             .sslConfig(context.getSslConfig())
                             .timeoutMs(context.getTimeoutMs())
diff --git a/server/api-service/lowcoder-sdk/src/main/java/org/lowcoder/sdk/webclient/WebClientBuildHelper.java b/server/api-service/lowcoder-sdk/src/main/java/org/lowcoder/sdk/webclient/WebClientBuildHelper.java
index 0610b6927..85e1e38b9 100644
--- a/server/api-service/lowcoder-sdk/src/main/java/org/lowcoder/sdk/webclient/WebClientBuildHelper.java
+++ b/server/api-service/lowcoder-sdk/src/main/java/org/lowcoder/sdk/webclient/WebClientBuildHelper.java
@@ -10,11 +10,13 @@
 import org.lowcoder.sdk.plugin.common.ssl.SslConfig;
 import org.lowcoder.sdk.plugin.common.ssl.SslHelper;
 import org.lowcoder.sdk.plugin.common.ssl.VerifySelfSignedCertSslConfig;
+import org.springframework.boot.context.properties.PropertyMapper;
 import org.springframework.http.client.reactive.ReactorClientHttpConnector;
 import org.springframework.web.reactive.function.client.WebClient;
 import org.springframework.web.reactive.function.client.WebClient.Builder;
 import reactor.netty.http.client.HttpClient;
 import reactor.netty.tcp.SslProvider;
+import reactor.netty.transport.ProxyProvider;
 import reactor.netty.transport.ProxyProvider.Proxy;
 
 import javax.net.ssl.SSLException;
@@ -28,6 +30,8 @@ public class WebClientBuildHelper {
 
     private static final String proxyHost;
     private static final String proxyPortStr;
+    private static final String proxyUsername;
+    private static final String proxyPassword;
 
     private SslConfig sslConfig;
     private Set<String> disallowedHosts;
@@ -39,6 +43,8 @@ public class WebClientBuildHelper {
     static {
         proxyHost = System.getProperty("http.proxyHost");
         proxyPortStr = System.getProperty("http.proxyPort");
+        proxyUsername = System.getProperty("http.proxyUsername");
+        proxyPassword = System.getProperty("http.proxyPassword");
     }
 
     private WebClientBuildHelper() {
@@ -92,10 +98,23 @@ public Builder toWebClientBuilder() {
                 httpClient = httpClient.secure(sslProviderWithSelfSignedCert(verifySelfSignedCertSslConfig));
             }
         }
-        if (systemProxy && StringUtils.isNoneBlank(proxyHost, proxyPortStr)) {
-            httpClient = httpClient.proxy(typeSpec -> typeSpec.type(Proxy.HTTP)
-                    .host(proxyHost)
-                    .port(Integer.parseInt(proxyPortStr)));
+        if (systemProxy && StringUtils.isNotBlank(proxyHost)) {
+            httpClient = httpClient.proxy(typeSpec -> {
+                        ProxyProvider.Builder builder = typeSpec
+                                .type(Proxy.HTTP)
+                                .host(proxyHost);
+                        PropertyMapper mapper = PropertyMapper.get();
+                        mapper.from(proxyPortStr)
+                                .whenHasText()
+                                .to(portStr -> builder.port(Integer.parseInt(portStr)));
+                        mapper.from(proxyUsername)
+                                .whenHasText()
+                                .to(builder::username);
+                        mapper.from(proxyPassword)
+                                .whenHasText()
+                                .to(password -> builder.password(s -> password));
+                    }
+            );
         }
         if (CollectionUtils.isNotEmpty(disallowedHosts)) {
             httpClient = httpClient.resolver(new SafeHostResolverGroup(disallowedHosts));