diff --git a/publish.yaml b/publish.yaml
index e62ecbf..83c6f9a 100644
--- a/publish.yaml
+++ b/publish.yaml
@@ -1,7 +1,7 @@
 Edition: 3.0.0
 Type: Project
 Name: start-unzip-oss-cap
-Version: 0.0.7
+Version: 0.0.8
 Provider:
   - 阿里云
 Description: 本案例展示了如何将ZIP文件进行解压，快速创建并部署到云原生应用开发平台 CAP。匹配解压规则的ZIP文件在上传到OSS，会自动触发解压，解压完成后存储至OSS指定目录中。
@@ -94,7 +94,7 @@ Parameters:
     processedDir:
       title: 解压目标目录
       type: string
-      default: dst
+      default: dst/
       description: 将匹配到的文件解压到此目标目录下。为防止循环触发产生不必要的费用，建议您设置不同于前缀的目标目录。
     retainFileName:
       title: 是否保留压缩文件名为路径目录
diff --git a/src/code/index.py b/src/code/index.py
index a4085d4..c418286 100644
--- a/src/code/index.py
+++ b/src/code/index.py
@@ -24,6 +24,7 @@
 import logging
 import zipfile
 import chardet
+import shutil
 
 # Close the info log printed by the oss SDK
 logging.getLogger("oss2.api").setLevel(logging.ERROR)
@@ -86,9 +87,11 @@ def handler(event, context):
     object_sizeMB = evt["oss"]["object"]["size"] / 1024 / 1024
     LOGGER.info("{} size is = {}MB".format(object_name, object_sizeMB))
 
-    if object_sizeMB > 10240 * 0.9:
+    WORK_DIR = os.environ.get("WORK_DIR", "/tmp")
+
+    if WORK_DIR == "/tmp" and object_sizeMB > 10240 * 0.9:
         raise RuntimeError(
-            "{} size is too large; please use NAS, refer: https://github.com/zhaohang88/unzip-oss-nas".format(
+            "{} size is too large; Please use NAS and set the WORK_DIR environment variable to specify the NAS mount directory. For reference, see: https://help.aliyun.com/zh/functioncompute/fc-3-0/user-guide/configure-a-nas-file-system-1".format(
                 object_name
             )
         )
@@ -120,7 +123,7 @@ def handler(event, context):
         newKeyPrefix = os.path.join(PROCESSED_DIR, zip_name)
     newKeyPrefix = newKeyPrefix.replace(".zip", "/")
 
-    tmpWorkDir = "/tmp/{}".format(context.request_id)
+    tmpWorkDir = "{}/{}".format(WORK_DIR, context.request_id)
     if not os.path.exists(tmpWorkDir):
         os.makedirs(tmpWorkDir)
 
@@ -134,10 +137,11 @@ def handler(event, context):
                     continue
                 f_size = file_info.file_size
                 if (
-                    object_sizeMB + f_size / 1024 / 1024 > 10240 * 0.99
+                    WORK_DIR == "/tmp"
+                    and object_sizeMB + f_size / 1024 / 1024 > 10240 * 0.99
                 ):  # if zip file + one file size > 0.99G, skip extract and upload
                     LOGGER.error(
-                        "{} size is too large; skip extract and upload".format(f)
+                        "{} size is too large; skip extract and upload. Please use NAS and set the WORK_DIR environment variable to specify the NAS mount directory. For reference, see: https://help.aliyun.com/zh/functioncompute/fc-3-0/user-guide/configure-a-nas-file-system-1".format(f)
                     )
                     continue
                 zip_file.extract(file_info.filename, tmpWorkDir)
@@ -152,3 +156,4 @@ def handler(event, context):
         LOGGER.error(e)
     finally:
         os.remove(tmpZipfile)
+        shutil.rmtree(tmpWorkDir)
diff --git a/src/code/speed.py b/src/code/speed.py
index 823c660..36b0452 100644
--- a/src/code/speed.py
+++ b/src/code/speed.py
@@ -62,7 +62,9 @@ def handler(event, context):
         newKeyPrefix = os.path.join(PROCESSED_DIR, zip_name)
     newKeyPrefix = newKeyPrefix.replace(".zip", "/")
 
-    tmpWorkDir = "/tmp/{}".format(context.request_id)
+    WORK_DIR = os.environ.get("WORK_DIR", "/tmp")
+    tmpWorkDir = "{}/{}".format(WORK_DIR, context.request_id)
+
     if not os.path.exists(tmpWorkDir):
         os.makedirs(tmpWorkDir)
 
diff --git a/src/s.yaml b/src/s.yaml
index 85b4872..8ddaeaf 100644
--- a/src/s.yaml
+++ b/src/s.yaml
@@ -33,6 +33,7 @@ resources:
       environmentVariables:
         PROCESSED_DIR: '{{ processedDir }}'
         RETAIN_FILE_NAME: '{{ retainFileName }}'
+        WORK_DIR: "/tmp"
       internetAccess: true
       role: '{{ roleArn }}'
       functionName: '{{ functionName }}'
diff --git a/src/variable.yaml b/src/variable.yaml
index de360d1..c67353f 100644
--- a/src/variable.yaml
+++ b/src/variable.yaml
@@ -3,7 +3,7 @@ services: #服务变量
     processedDir:
       title: 解压目标目录
       type: string
-      default: dst
+      default: dst/
       description: 将匹配到的文件解压到此目标目录下。为防止循环触发产生不必要的费用，建议您设置不同于前缀的目标目录。
     retainFileName:
       title: 是否保留压缩文件名为路径目录