diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index b8b854c258..5512f809c2 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -17,6 +17,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-640 - Cache object size calculate incorrect
 - MS-641 - Segment fault(signal 11) in PickToLoad
 - MS-639 - SQ8H index created failed and server hang
+- MS-647 - [monitor] grafana display average cpu-temp
 
 ## Improvement
 - MS-552 - Add and change the easylogging library
diff --git a/cpp/src/metrics/PrometheusMetrics.cpp b/cpp/src/metrics/PrometheusMetrics.cpp
index 182f14d46c..dec7c264fd 100644
--- a/cpp/src/metrics/PrometheusMetrics.cpp
+++ b/cpp/src/metrics/PrometheusMetrics.cpp
@@ -222,10 +222,19 @@ PrometheusMetrics::CPUTemperature() {
 
     std::vector<float> CPU_temperatures = server::SystemInfo::GetInstance().CPUTemperature();
 
+    float avg_cpu_temp = 0;
     for (int i = 0; i < CPU_temperatures.size(); ++i) {
-        prometheus::Gauge& cpu_temp = CPU_temperature_.Add({{"CPU", std::to_string(i)}});
-        cpu_temp.Set(CPU_temperatures[i]);
+        avg_cpu_temp += CPU_temperatures[i];
     }
+    avg_cpu_temp /= CPU_temperatures.size();
+
+    prometheus::Gauge& cpu_temp = CPU_temperature_.Add({{"CPU", std::to_string(0)}});
+    cpu_temp.Set(avg_cpu_temp);
+
+//    for (int i = 0; i < CPU_temperatures.size(); ++i) {
+//        prometheus::Gauge& cpu_temp = CPU_temperature_.Add({{"CPU", std::to_string(i)}});
+//        cpu_temp.Set(CPU_temperatures[i]);
+//    }
 }
 
 void