diff --git a/runtime/onert/backend/cpu/ExternalContext.h b/runtime/onert/backend/cpu/ExternalContext.h
index 6ed4799a80c..8c1f4ccf16c 100644
--- a/runtime/onert/backend/cpu/ExternalContext.h
+++ b/runtime/onert/backend/cpu/ExternalContext.h
@@ -37,7 +37,7 @@ class ExternalContext
 public:
   ExternalContext() : _ruy_context(new ruy::Context)
   {
-    setMaxNumThreads(onert::util::getConfigInt(onert::util::config::RUY_THREADS));
+    setMaxNumThreads(onert::util::getConfigInt(onert::util::config::NUM_THREADS));
   }
 
   void setMaxNumThreads(int max_num_threads)
diff --git a/runtime/onert/backend/ruy/ExternalContext.h b/runtime/onert/backend/ruy/ExternalContext.h
index c73ae636efb..e8502378a00 100644
--- a/runtime/onert/backend/ruy/ExternalContext.h
+++ b/runtime/onert/backend/ruy/ExternalContext.h
@@ -37,7 +37,7 @@ class ExternalContext
 public:
   ExternalContext() : _ruy_context(new ::ruy::Context)
   {
-    setMaxNumThreads(onert::util::getConfigInt(onert::util::config::RUY_THREADS));
+    setMaxNumThreads(onert::util::getConfigInt(onert::util::config::NUM_THREADS));
   }
 
   void setMaxNumThreads(int max_num_threads)
diff --git a/runtime/onert/backend/xnnpack/BackendContext.h b/runtime/onert/backend/xnnpack/BackendContext.h
index e3b66eef374..a88e0b9a6d2 100644
--- a/runtime/onert/backend/xnnpack/BackendContext.h
+++ b/runtime/onert/backend/xnnpack/BackendContext.h
@@ -42,7 +42,7 @@ class BackendContext : public onert::backend::BackendContext
     : onert::backend::BackendContext(backend, std::move(data), tensor_registry),
       tensor_builder{tensor_builder}, kernel_gen{kernel_gen}, _external_context(nullptr)
   {
-    int num_threads = util::getConfigInt(util::config::XNNPACK_THREADS);
+    int num_threads = util::getConfigInt(util::config::NUM_THREADS);
     if (num_threads < 1)
       num_threads = kDefaultNumThreadpoolThreads; // default num of threads
     _external_context.reset(new ExternalContext(static_cast<size_t>(num_threads)));
diff --git a/runtime/onert/core/include/util/Config.lst b/runtime/onert/core/include/util/Config.lst
index 07479b70c74..bae8a30b2df 100644
--- a/runtime/onert/core/include/util/Config.lst
+++ b/runtime/onert/core/include/util/Config.lst
@@ -31,8 +31,7 @@ CONFIG(USE_SCHEDULER           , bool         , "0")
 CONFIG(TRACING_MODE            , bool         , "0")
 CONFIG(MINMAX_DUMP             , bool         , "0")
 CONFIG(FP16_ENABLE             , bool         , "0")
-CONFIG(RUY_THREADS             , int          , "-1")
-CONFIG(XNNPACK_THREADS         , int          , "-1")
+CONFIG(NUM_THREADS             , int          , "-1")
 CONFIG(USE_MMAPED_DATA         , bool         , "0")
 CONFIG(WORKSPACE_DIR           , std::string  , ".")
 
diff --git a/runtime/onert/core/src/backend/builtin/ExternalContext.h b/runtime/onert/core/src/backend/builtin/ExternalContext.h
index 390dbb5799e..9ec222e5c56 100644
--- a/runtime/onert/core/src/backend/builtin/ExternalContext.h
+++ b/runtime/onert/core/src/backend/builtin/ExternalContext.h
@@ -42,7 +42,7 @@ class ExternalContext
 public:
   ExternalContext() : _ruy_context(std::make_unique<ruy::Context>())
   {
-    setMaxNumThreads(onert::util::getConfigInt(onert::util::config::RUY_THREADS));
+    setMaxNumThreads(onert::util::getConfigInt(onert::util::config::NUM_THREADS));
     initPerThreadState();
   }
 
diff --git a/tools/stab/backend_scheduler.py b/tools/stab/backend_scheduler.py
index b5a77f72727..57d1a15e183 100644
--- a/tools/stab/backend_scheduler.py
+++ b/tools/stab/backend_scheduler.py
@@ -145,8 +145,7 @@ def schedule(self):
                 for op in op_list:
                     cmd += [f"OP_BACKEND_{op}={default_backend}"]
         cmd += [f"BACKENDS={';'.join(backend_list)}"]
-        cmd += [f"RUY_THREADS={self.num_threads}"]
-        cmd += [f"XNNPACK_THREADS={self.num_threads}"]
+        cmd += [f"NUM_THREADS={self.num_threads}"]
         logging.info(' '.join(cmd))
 
         # Create nnpackage with backend mapping
diff --git a/tools/stab/remote.py b/tools/stab/remote.py
index 4189bef9991..957c66cd227 100644
--- a/tools/stab/remote.py
+++ b/tools/stab/remote.py
@@ -74,8 +74,7 @@ def profile_backend(self, backend, backend_op_list):
             if backend == target_backend:
                 for op in op_list:
                     cmd += [f"OP_BACKEND_{op}={backend}"]
-        cmd += [f"XNNPACK_THREADS={self.num_threads}"]
-        cmd += [f"RUY_THREADS={self.num_threads}"]
+        cmd += [f"NUM_THREADS={self.num_threads}"]
         cmd += [f"BACKENDS=\'{';'.join(['cpu', backend])}\'"]
         cmd += [f"{nnpkg_run_path}"]
         cmd += [f"-w5 -r50"]