diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index 87dfa83427f77ab130711256b7cc90d5c734c72e..a7ddee104a3639556a54cd255b58825324d414a1 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -33,6 +33,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-379 - Add Dump implementation in Resource
 - MS-380 - Update resource loader and executor, work util all finished
 - MS-383 - Modify condition variable usage in scheduler
+- MS-384 - Add global instance of ResourceMgr and Scheduler
 
 ## New Feature
 - MS-343 - Implement ResourceMgr
diff --git a/cpp/src/scheduler/ResourceMgr.h b/cpp/src/scheduler/ResourceMgr.h
index cb2e63193524194971ac9fac197f0b91146fccca..5d273a4f3881bfb11167babad8842c43cead9627 100644
--- a/cpp/src/scheduler/ResourceMgr.h
+++ b/cpp/src/scheduler/ResourceMgr.h
@@ -1,4 +1,3 @@
-
 /*******************************************************************************
  * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
  * Unauthorized copying of this file, via any medium is strictly prohibited.
@@ -61,7 +60,7 @@ public:
     Stop();
 
     void
-    PostEvent(const EventPtr& event);
+    PostEvent(const EventPtr &event);
 
     // TODO: add stats interface(low)
 
diff --git a/cpp/src/scheduler/SchedInst.cpp b/cpp/src/scheduler/SchedInst.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..7d975c164331c6ec4ca8f4da8b877219e4be3c41
--- /dev/null
+++ b/cpp/src/scheduler/SchedInst.cpp
@@ -0,0 +1,22 @@
+/*******************************************************************************
+ * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
+ * Unauthorized copying of this file, via any medium is strictly prohibited.
+ * Proprietary and confidential.
+ ******************************************************************************/
+
+#include "SchedInst.h"
+
+
+namespace zilliz {
+namespace milvus {
+namespace engine {
+
+ResourceMgrPtr ResMgrInst::instance = nullptr;
+std::mutex ResMgrInst::mutex_;
+
+SchedulerPtr SchedInst::instance = nullptr;
+std::mutex SchedInst::mutex_;
+
+}
+}
+}
diff --git a/cpp/src/scheduler/SchedInst.h b/cpp/src/scheduler/SchedInst.h
new file mode 100644
index 0000000000000000000000000000000000000000..c05f525e3a3d69f5ef07cf2c4a30c8900569b8f9
--- /dev/null
+++ b/cpp/src/scheduler/SchedInst.h
@@ -0,0 +1,57 @@
+/*******************************************************************************
+ * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
+ * Unauthorized copying of this file, via any medium is strictly prohibited.
+ * Proprietary and confidential.
+ ******************************************************************************/
+#pragma once
+
+#include "ResourceMgr.h"
+#include "Scheduler.h"
+
+#include <mutex>
+#include <memory>
+
+
+namespace zilliz {
+namespace milvus {
+namespace engine {
+
+class ResMgrInst {
+public:
+    static ResourceMgrPtr
+    GetInstance() {
+        if (instance == nullptr) {
+            std::lock_guard<std::mutex> lock(mutex_);
+            if (instance == nullptr) {
+                instance = std::make_shared<ResourceMgr>();
+            }
+        }
+        return instance;
+    }
+
+private:
+    static ResourceMgrPtr instance;
+    static std::mutex mutex_;
+};
+
+class SchedInst {
+public:
+    static SchedulerPtr
+    GetInstance() {
+        if (instance == nullptr) {
+            std::lock_guard<std::mutex> lock(mutex_);
+            if (instance == nullptr) {
+                instance = std::make_shared<Scheduler>(ResMgrInst::GetInstance());
+            }
+        }
+        return instance;
+    }
+
+private:
+    static SchedulerPtr instance;
+    static std::mutex mutex_;
+};
+
+}
+}
+}
diff --git a/cpp/unittest/scheduler/normal_test.cpp b/cpp/unittest/scheduler/normal_test.cpp
index d9e4ad218c11c216eb18b1bef9af96d62c9f4f6a..27d16a1b6b8bd7de3719d2a3339aabd761c9a702 100644
--- a/cpp/unittest/scheduler/normal_test.cpp
+++ b/cpp/unittest/scheduler/normal_test.cpp
@@ -2,6 +2,7 @@
 #include "scheduler/ResourceMgr.h"
 #include "scheduler/Scheduler.h"
 #include "scheduler/task/TestTask.h"
+#include "scheduler/SchedInst.h"
 #include "utils/Log.h"
 #include <gtest/gtest.h>
 
@@ -10,7 +11,8 @@ using namespace zilliz::milvus::engine;
 
 TEST(normal_test, test1) {
     // ResourceMgr only compose resources, provide unified event
-    auto res_mgr = std::make_shared<ResourceMgr>();
+//    auto res_mgr = std::make_shared<ResourceMgr>();
+    auto res_mgr = ResMgrInst::GetInstance();
     auto disk = res_mgr->Add(ResourceFactory::Create("disk", "ssd"));
     auto cpu = res_mgr->Add(ResourceFactory::Create("cpu"));
     auto gpu1 = res_mgr->Add(ResourceFactory::Create("gpu"));
@@ -24,10 +26,11 @@ TEST(normal_test, test1) {
 
     res_mgr->Start();
 
-    auto scheduler = new Scheduler(res_mgr);
+//    auto scheduler = new Scheduler(res_mgr);
+    auto scheduler = SchedInst::GetInstance();
     scheduler->Start();
 
-    const uint64_t NUM_TASK = 10;
+    const uint64_t NUM_TASK = 100;
     std::vector<std::shared_ptr<TestTask>> tasks;
     for (uint64_t i = 0; i < NUM_TASK; ++i) {
         if (auto observe = disk.lock()) {
@@ -37,45 +40,8 @@ TEST(normal_test, test1) {
         }
     }
 
-    if (auto disk_r = disk.lock()) {
-        if (auto cpu_r = cpu.lock()) {
-            if (auto gpu1_r = gpu1.lock()) {
-                if (auto gpu2_r = gpu2.lock()) {
-                    std::cout << "<<<<<<<<<<before<<<<<<<<<<" << std::endl;
-                    std::cout << "disk:" << std::endl;
-                    std::cout << disk_r->task_table().Dump() << std::endl;
-                    std::cout << "cpu:" << std::endl;
-                    std::cout << cpu_r->task_table().Dump() << std::endl;
-                    std::cout << "gpu1:" << std::endl;
-                    std::cout << gpu1_r->task_table().Dump() << std::endl;
-                    std::cout << "gpu2:" << std::endl;
-                    std::cout << gpu2_r->task_table().Dump() << std::endl;
-                    std::cout << ">>>>>>>>>>before>>>>>>>>>>" << std::endl;
-                }
-            }
-        }
-    }
-
     sleep(1);
 
-    if (auto disk_r = disk.lock()) {
-        if (auto cpu_r = cpu.lock()) {
-            if (auto gpu1_r = gpu1.lock()) {
-                if (auto gpu2_r = gpu2.lock()) {
-                    std::cout << "<<<<<<<<<<after<<<<<<<<<<" << std::endl;
-                    std::cout << "disk:" << std::endl;
-                    std::cout << disk_r->task_table().Dump() << std::endl;
-                    std::cout << "cpu:" << std::endl;
-                    std::cout << cpu_r->task_table().Dump() << std::endl;
-                    std::cout << "gpu1:" << std::endl;
-                    std::cout << gpu1_r->task_table().Dump() << std::endl;
-                    std::cout << "gpu2:" << std::endl;
-                    std::cout << gpu2_r->task_table().Dump() << std::endl;
-                    std::cout << ">>>>>>>>>>after>>>>>>>>>>" << std::endl;
-                }
-            }
-        }
-    }
     scheduler->Stop();
     res_mgr->Stop();