diff --git a/src/agentscope/web/studio/constants.py b/src/agentscope/web/studio/constants.py
new file mode 100644
index 000000000..0d593113b
--- /dev/null
+++ b/src/agentscope/web/studio/constants.py
@@ -0,0 +1,4 @@
+# -*- coding: utf-8 -*-
+""" Some constants used in the AS studio"""
+
+_SPEAK = "**speak**"
diff --git a/src/agentscope/web/studio/studio.py b/src/agentscope/web/studio/studio.py
index 3fa4b34b3..58889dcf1 100644
--- a/src/agentscope/web/studio/studio.py
+++ b/src/agentscope/web/studio/studio.py
@@ -30,7 +30,9 @@
     audio2text,
     send_reset_msg,
     thread_local_data,
+    cycle_dots,
 )
+from agentscope.web.studio.constants import _SPEAK
 
 MAX_NUM_DISPLAY_MSG = 20
 FAIL_COUNT_DOWN = 30
@@ -42,24 +44,34 @@ def init_uid_list() -> list:
 
 
 glb_history_dict = defaultdict(init_uid_list)
+glb_doing_signal_dict = defaultdict(init_uid_list)
 glb_signed_user = []
 
 
 def reset_glb_var(uid: str) -> None:
     """Reset global variables for a given user ID."""
     global glb_history_dict
+    global glb_doing_signal_dict
     glb_history_dict[uid] = init_uid_list()
+    glb_doing_signal_dict[uid] = init_uid_list()
 
 
 def get_chat(uid: str) -> list[list]:
     """Retrieve chat messages for a given user ID."""
     uid = check_uuid(uid)
     global glb_history_dict
+    global glb_doing_signal_dict
+
     line = get_chat_msg(uid=uid)
     # TODO: Optimize the display effect, currently there is a problem of
     #  output display jumping
     if line:
-        glb_history_dict[uid] += [line]
+        if line[1] and line[1]["text"] == _SPEAK:
+            line[1]["text"] = ""
+            glb_doing_signal_dict[uid] = line
+        else:
+            glb_history_dict[uid] += [line]
+            glb_doing_signal_dict[uid] = []
     dial_msg = []
     for line in glb_history_dict[uid]:
         _, msg = line
@@ -68,6 +80,14 @@ def get_chat(uid: str) -> list[list]:
         else:
             # User chat, format: (msg, None)
             dial_msg.append(line)
+    if glb_doing_signal_dict[uid]:
+        if glb_doing_signal_dict[uid][1]:
+            text = cycle_dots(glb_doing_signal_dict[uid][1]["text"])
+            glb_doing_signal_dict[uid][1]["text"] = text
+            glb_doing_signal_dict[uid][1]["id"] = str(time.time())
+            glb_doing_signal_dict[uid][1]["flushing"] = False
+
+        dial_msg.append(glb_doing_signal_dict[uid])
     return dial_msg[-MAX_NUM_DISPLAY_MSG:]
 
 
diff --git a/src/agentscope/web/studio/utils.py b/src/agentscope/web/studio/utils.py
index 47fd83e3c..36ac7f149 100644
--- a/src/agentscope/web/studio/utils.py
+++ b/src/agentscope/web/studio/utils.py
@@ -187,6 +187,15 @@ def audio2text(audio_path: str) -> str:
     return " ".join([s["text"] for s in result["output"]["sentence"]])
 
 
+def cycle_dots(text: str, num_dots: int = 3) -> str:
+    """display thinking dots before agent reply"""
+    current_dots = len(text) - len(text.rstrip("."))
+    next_dots = (current_dots + 1) % (num_dots + 1)
+    if next_dots == 0:
+        next_dots = 1
+    return text.rstrip(".") + "." * next_dots
+
+
 def user_input(
     prefix: str = "User input: ",
     timeout: Optional[int] = None,