diff --git a/CHANGLOG.md b/CHANGLOG.md
index 07c7cc8..6cd27b0 100644
--- a/CHANGLOG.md
+++ b/CHANGLOG.md
@@ -1,4 +1,8 @@
-## [0.1.20] - 2025-11-10
+## [0.1.21] - 2025-12-23
+### Added
+- runtime scene support get from env
+
+## [0.1.20] - 2025-12-08
 ### Added
 - langchain callback support langchain V1
 - langchain callback support set tag and name
diff --git a/cozeloop/integration/langchain/trace_callback.py b/cozeloop/integration/langchain/trace_callback.py
index 964a850..0e86c07 100644
--- a/cozeloop/integration/langchain/trace_callback.py
+++ b/cozeloop/integration/langchain/trace_callback.py
@@ -324,7 +324,7 @@ def _new_flow_span(self, node_name: str, span_type: str, **kwargs: Any) -> Span:
         flow_span = _trace_callback_client.start_span(span_name, span_type, child_of=parent_span)
         run_id = str(kwargs['run_id'])
         self.run_map[run_id] = Run(run_id, flow_span, span_type)
-        # set default tags
+        # set runtime
         flow_span.set_runtime(RuntimeInfo())
         # set extra tags
         flow_span.set_tags(self._tags) # global tags
diff --git a/cozeloop/internal/trace/span.py b/cozeloop/internal/trace/span.py
index 1a64b6c..98228b7 100644
--- a/cozeloop/internal/trace/span.py
+++ b/cozeloop/internal/trace/span.py
@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: MIT
 
 import logging
+import os
 from abc import ABC
 from typing import Dict, Any, List, Optional
 from datetime import datetime
@@ -369,6 +370,9 @@ def set_start_time_first_resp(self, start_time_first_resp: int):
     def set_runtime(self, runtime: Runtime) -> None:
         r = runtime
         r.scene = V_SCENE_CUSTOM
+        scene = os.getenv('COZELOOP_SCENE') # record scene from env
+        if scene:
+            r.scene = scene
         with self.lock:
             if self.system_tag_map is None:
                 self.system_tag_map = {}
diff --git a/cozeloop/internal/version.py b/cozeloop/internal/version.py
index 10d35b1..933c145 100644
--- a/cozeloop/internal/version.py
+++ b/cozeloop/internal/version.py
@@ -1,4 +1,4 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-VERSION = 'v0.1.20'
\ No newline at end of file
+VERSION = 'v0.1.21'
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index ff50f52..7d1cb14 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "cozeloop"
-version = "0.1.20"
+version = "0.1.21"
 description = "coze loop sdk"
 authors = ["JiangQi715 <jiangqi.rrt@bytedance.com>"]
 license = "MIT"