diff --git a/core/include/alibabacloud/core/ServiceRequest.h b/core/include/alibabacloud/core/ServiceRequest.h
index 310e62dda..b779c85d6 100644
--- a/core/include/alibabacloud/core/ServiceRequest.h
+++ b/core/include/alibabacloud/core/ServiceRequest.h
@@ -54,10 +54,16 @@ class ALIBABACLOUD_CORE_EXPORT ServiceRequest {
   void addParameter(const ParameterNameType &name,
     const ParameterValueType &value);
   ParameterValueType parameter(const ParameterNameType &name) const;
+  ParameterValueType coreParameter(const ParameterNameType &name) const;
   void removeParameter(const ParameterNameType &name);
   void setContent(const char *data, size_t size);
   void setParameter(const ParameterNameType &name,
       const ParameterValueType &value);
+
+  void setCoreParameter(const ParameterNameType &name,
+      const ParameterValueType &value);
+
+
   void setParameters(const ParameterCollection &params);
   void setResourcePath(const std::string &path);
   void setProduct(const std::string &product);
diff --git a/core/src/ServiceRequest.cc b/core/src/ServiceRequest.cc
index a6326957e..f3f859114 100644
--- a/core/src/ServiceRequest.cc
+++ b/core/src/ServiceRequest.cc
@@ -110,6 +110,12 @@ ServiceRequest::ParameterValueType ServiceRequest::parameter(
   return it->second;
 }
 
+
+ServiceRequest::ParameterValueType ServiceRequest::coreParameter(
+  const ParameterNameType &name)const {
+  return parameter(name);
+}
+
 ServiceRequest::ParameterCollection ServiceRequest::parameters() const {
   return params_;
 }
@@ -123,6 +129,12 @@ void ServiceRequest::setParameter(const ParameterNameType &name,
   params_[name] = value;
 }
 
+void ServiceRequest::setCoreParameter(const ParameterNameType &name,
+  const ParameterValueType &value) {
+  setParameter(name, value);
+}
+
+
 void ServiceRequest::setParameters(const ParameterCollection & params) {
   params_ = params;
 }
diff --git a/test/core/servicerequest_ut.cc b/test/core/servicerequest_ut.cc
index 0cbcdcc61..85530dcf1 100644
--- a/test/core/servicerequest_ut.cc
+++ b/test/core/servicerequest_ut.cc
@@ -31,7 +31,8 @@ namespace {
     using ServiceRequest::setResourcePath;
     using ServiceRequest::setProduct;
     using ServiceRequest::setVersion;
-
+    using ServiceRequest::setCoreParameter;
+    using ServiceRequest::coreParameter;
   };
 
   TEST(ServiceRequest, basic) {
@@ -54,8 +55,13 @@ namespace {
     sr1.removeParameter("k1");
     EXPECT_TRUE(sr1.parameters().size() == 1);
 
+    sr1.setCoreParameter("kcore1", "vcore1");
+    EXPECT_TRUE(sr1.parameter("kcore1") == "vcore1");
+    EXPECT_TRUE(sr1.coreParameter("kcore1") == "vcore1");
+
     sr1.setParameter("ka", "va");
     EXPECT_TRUE(sr1.parameter("ka") == "va");
+    EXPECT_TRUE(sr1.coreParameter("ka") == "va");
 
     sr1.setContent("123456", 6);
     EXPECT_TRUE(sr1.contentSize() == 6);