diff --git a/src/main.py b/src/main.py
index 932fbfcfe..9ab75f46a 100644
--- a/src/main.py
+++ b/src/main.py
@@ -58,7 +58,7 @@ class MainSystem:
 
         # 检查并清除person_info冗余字段，启动个人习惯推断
         await person_info_manager.del_all_undefined_field()
-        # asyncio.create_task(person_info_manager.personal_habit_deduction())
+        asyncio.create_task(person_info_manager.personal_habit_deduction())
 
         # 启动愿望管理器
         await willing_manager.ensure_started()
diff --git a/src/plugins/chat/message_buffer.py b/src/plugins/chat/message_buffer.py
index a7be8abcd..c1bac3b14 100644
--- a/src/plugins/chat/message_buffer.py
+++ b/src/plugins/chat/message_buffer.py
@@ -163,7 +163,7 @@ class MassageBuffer:
         if len(message_interval_list) < 1000:
             message_interval_list.append(now_time_ms)
         else:
-            message_interval_list = message_interval_list.pop(0)
+            message_interval_list.pop(0)
             message_interval_list.append(now_time_ms)
         data = {
             "platform" : message.platform,
diff --git a/src/plugins/person_info/person_info.py b/src/plugins/person_info/person_info.py
index 20ab2db8b..7df27b632 100644
--- a/src/plugins/person_info/person_info.py
+++ b/src/plugins/person_info/person_info.py
@@ -5,6 +5,11 @@ import hashlib
 from typing import Any, Callable, Dict, TypeVar
 T = TypeVar('T')  # 泛型类型
 import datetime
+import asyncio
+import numpy
+
+import matplotlib.pyplot as plt
+from pathlib import Path
 
 """
 PersonInfoManager 类方法功能摘要：
@@ -38,7 +43,6 @@ person_info_default = {
 
 class PersonInfoManager:
     def __init__(self):
-        self.start_time = datetime.datetime.now()
         if "person_info" not in db.list_collection_names():
             db.create_collection("person_info")
             db.person_info.create_index("person_id", unique=True)
@@ -222,29 +226,59 @@ class PersonInfoManager:
     async def personal_habit_deduction(self):
         """启动个人信息推断，每天根据一定条件推断一次"""
         try:
-            logger.info(f"个人信息推断启动: {self.start_time.strftime('%Y-%m-%d %H:%M:%S')}")
-        #     # 初始化日程
-        #     await self.check_and_create_today_schedule()
-        #     self.print_schedule()
+            while(1):
+                await asyncio.sleep(60)
+                current_time = datetime.datetime.now()
+                logger.info(f"个人信息推断启动: {current_time.strftime('%Y-%m-%d %H:%M:%S')}")
 
-        #     while True:
-        #         # print(self.get_current_num_task(1, True))
+                # "msg_interval"推断
+                msg_interval_lists = await self.get_specific_value_list(
+                    "msg_interval_list", 
+                    lambda x: isinstance(x, list) and len(x) >= 100
+                )
+                for person_id, msg_interval_list_ in msg_interval_lists.items():
+                    try:
+                        time_interval = []
+                        for t1, t2 in zip(msg_interval_list_, msg_interval_list_[1:]):
+                            delta = t2 - t1
+                            if delta < 6000:  # 小于6秒
+                                time_interval.append(delta)
 
-        #         current_time = datetime.datetime.now()
+                        if len(time_interval) > 30:
+                            time_interval.sort()
 
-        #         # 检查是否需要重新生成日程（日期变化）
-        #         if current_time.date() != self.start_time.date():
-        #             logger.info("检测到日期变化，重新生成日程")
-        #             self.start_time = current_time
-        #             await self.check_and_create_today_schedule()
-        #             self.print_schedule()
+                            # 画图(log)
+                            log_dir = Path("logs/person_info")
+                            log_dir.mkdir(parents=True, exist_ok=True)
+                            plt.figure(figsize=(10, 6))
 
-        #         # 执行当前活动
-        #         # mind_thinking = heartflow.current_state.current_mind
+                            plt.hist(time_interval, bins=30, density=True, alpha=0.5, color='g')
 
-        #         await self.move_doing()
+                            plt.grid(True, alpha=0.3)
 
-        #         await asyncio.sleep(self.schedule_doing_update_interval)
+                            plt.title(f"Message Interval Density (User: {person_id[:8]}...)")
+                            plt.xlabel("Interval (ms)")
+                            plt.ylabel("Density")
+
+                            img_path = log_dir / f"interval_density_{person_id[:8]}.png"
+                            plt.savefig(img_path)
+                            plt.close()
+                            logger.info(f"已保存分布图到: {img_path}")
+                            # 画图
+                            
+                            filtered_intervals = [t for t in time_interval if t >= 500]
+                            if len(filtered_intervals) > 25:
+                                msg_interval = numpy.percentile(filtered_intervals, 90)
+                                await self.update_one_field(person_id, "msg_interval", int(msg_interval))
+                                logger.debug(f"用户{person_id}的msg_interval已经被更新为{msg_interval}")
+                    except Exception as e:
+                        logger.debug(f"处理用户{person_id}msg_interval推断时出错: {str(e)}")
+                        continue
+
+                # 其他...
+
+                logger.info(f"个人信息推断结束: {current_time.strftime('%Y-%m-%d %H:%M:%S')}")
+                await asyncio.sleep(86400)
 
         except Exception as e:
             logger.error(f"个人信息推断运行时出错: {str(e)}")