diff --git a/csst_common/data_manager.py b/csst_common/data_manager.py
index 59d361ca587cff0ef102f1edb7fe821a22b2188f..e56ce94b694f94e7e5ce7251b7bc372e1ed81ab1 100644
--- a/csst_common/data_manager.py
+++ b/csst_common/data_manager.py
@@ -115,6 +115,8 @@ class CsstMsDataManager:
         The number of jobs.
     backend : str
         The joblib backend.
+    device : str
+        The device for neural network. "CPU" or "GPU".
 
     Examples
     --------
@@ -161,7 +163,8 @@ class CsstMsDataManager:
                  clear_dir=False,
                  verbose=True,
                  n_jobs=18,
-                 backend="multiprocessing"
+                 backend="multiprocessing",
+                 device="CPU"
                  ):
 
         # set DFS log dir
@@ -227,6 +230,7 @@ class CsstMsDataManager:
 
         self.n_jobs = n_jobs
         self.backend = backend
+        self.device = device
 
         # aXe
         self.set_env()
@@ -331,7 +335,8 @@ class CsstMsDataManager:
             log_ppl="csst-l1ppl.log",
             log_mod="csst-l1mod.log",
             n_jobs=18,
-            backend="multiprocessing"
+            backend="multiprocessing",
+            device="CPU"
     ):
         """ initialize the multi-band imaging data manager """
 
@@ -376,7 +381,8 @@ class CsstMsDataManager:
             log_ppl=log_ppl,
             log_mod=log_mod,
             n_jobs=n_jobs,
-            backend=backend
+            backend=backend,
+            device=device
         )
 
     @staticmethod
@@ -788,7 +794,8 @@ class CsstMsDataManager:
             clear_l1=False,
             dfs_root="/share/dfs",
             n_jobs=18,
-            backend="multiprocessing"
+            backend="multiprocessing",
+            device="CPU"
     ):
         """ Initialize CsstMsDataManager from DFS. """
         # (clear and) make directories
@@ -830,7 +837,8 @@ class CsstMsDataManager:
             use_dfs=use_dfs,
             dfs_node=dfs_node,
             n_jobs=n_jobs,
-            backend=backend
+            backend=backend,
+            device=device
         )
         assert dm.obs_id == obs_id