diff --git a/cpp/ppc-framework/protocol/Task.h b/cpp/ppc-framework/protocol/Task.h
index a43dd4fb..471ddd2b 100644
--- a/cpp/ppc-framework/protocol/Task.h
+++ b/cpp/ppc-framework/protocol/Task.h
@@ -63,14 +63,10 @@ class TaskResult
     virtual void setFileInfo(FileInfo::Ptr _fileInfo) { m_fileInfo = std::move(_fileInfo); }
 
     // serialize the taskResult to json
-    virtual Json::Value serializeToJson() const
+    virtual Json::Value serializeToJson()
     {
         Json::Value response;
         response["taskID"] = m_taskID;
-        if (!m_status.empty())
-        {
-            response["status"] = m_status;
-        }
         if (m_timeCost)
         {
             response["timeCost"] = std::to_string(m_timeCost) + "ms";
@@ -81,15 +77,21 @@ class TaskResult
             response["fileID"] = m_fileInfo->fileID;
             response["fileMd5"] = m_fileInfo->fileMd5;
         }
-        if (m_error)
+        if (m_error && m_error->errorCode() != 0)
         {
             response["code"] = m_error->errorCode();
             response["message"] = m_error->errorMessage();
+            setStatus(ppc::protocol::toString(TaskStatus::FAILED));
         }
         else
         {
             response["code"] = 0;
             response["message"] = "success";
+            sestStatus(ppc::protocol::toString(TaskStatus::COMPLETED));
+        }
+        if (!m_status.empty())
+        {
+            response["status"] = m_status;
         }
         return response;
     }
diff --git a/cpp/wedpr-computing/ppc-psi/src/bs-ecdh-psi/protocol/BsEcdhResult.h b/cpp/wedpr-computing/ppc-psi/src/bs-ecdh-psi/protocol/BsEcdhResult.h
index e132f198..204a515a 100644
--- a/cpp/wedpr-computing/ppc-psi/src/bs-ecdh-psi/protocol/BsEcdhResult.h
+++ b/cpp/wedpr-computing/ppc-psi/src/bs-ecdh-psi/protocol/BsEcdhResult.h
@@ -43,7 +43,7 @@ class BsEcdhResult : public protocol::TaskResult
     [[nodiscard]] Json::Value const& data() const { return m_data; }
 
     // serialize the taskResult to json
-    [[nodiscard]] Json::Value serializeToJson() const override
+    [[nodiscard]] Json::Value serializeToJson() override
     {
         Json::Value response;
         if (m_error && error()->errorCode())
diff --git a/cpp/wedpr-computing/ppc-psi/src/cm2020-psi/protocol/CM2020PSIResult.h b/cpp/wedpr-computing/ppc-psi/src/cm2020-psi/protocol/CM2020PSIResult.h
index 4d461183..a17934a5 100644
--- a/cpp/wedpr-computing/ppc-psi/src/cm2020-psi/protocol/CM2020PSIResult.h
+++ b/cpp/wedpr-computing/ppc-psi/src/cm2020-psi/protocol/CM2020PSIResult.h
@@ -44,7 +44,7 @@ class CM2020PSIResult : public protocol::TaskResult
     }
 
     // serialize the taskResult to json
-    [[nodiscard]] Json::Value serializeToJson() const override
+    [[nodiscard]] Json::Value serializeToJson() override
     {
         Json::Value response;
         response["taskID"] = taskID();
diff --git a/cpp/wedpr-computing/ppc-psi/src/labeled-psi/protocol/LabeledPSIResult.h b/cpp/wedpr-computing/ppc-psi/src/labeled-psi/protocol/LabeledPSIResult.h
index 13dd3bf6..bc0dc1de 100644
--- a/cpp/wedpr-computing/ppc-psi/src/labeled-psi/protocol/LabeledPSIResult.h
+++ b/cpp/wedpr-computing/ppc-psi/src/labeled-psi/protocol/LabeledPSIResult.h
@@ -47,7 +47,7 @@ class LabeledPSIResult : public protocol::TaskResult
     const std::vector<std::vector<std::string>>& getOutputs() { return m_outputs; }
 
     // serialize the taskResult to json
-    Json::Value serializeToJson() const override
+    Json::Value serializeToJson() override
     {
         Json::Value response;
         response["taskID"] = taskID();
diff --git a/cpp/wedpr-transport/ppc-rpc/src/Rpc.cpp b/cpp/wedpr-transport/ppc-rpc/src/Rpc.cpp
index 5b039131..b6ed99a3 100644
--- a/cpp/wedpr-transport/ppc-rpc/src/Rpc.cpp
+++ b/cpp/wedpr-transport/ppc-rpc/src/Rpc.cpp
@@ -226,7 +226,7 @@ void Rpc::runTask(Json::Value const& _req, RespFunc _respFunc)
             _respFunc(result->error(), result->serializeToJson());
             return;
         }
-
+        result->setStatus(toString(TaskStatus::COMPLETED));
         _respFunc(_result->error(), _result->serializeToJson());
     });
 }