diff --git a/src/core/config.py b/src/core/config.py
index 32955cb..e1398f2 100644
--- a/src/core/config.py
+++ b/src/core/config.py
@@ -6,6 +6,7 @@
 import sys
 
 from astrbot.api import AstrBotConfig, logger
+from astrbot.core.utils.astrbot_path import get_astrbot_data_path
 
 
 class ConfigManager:
@@ -139,9 +140,17 @@ class ConfigManager:
 
     def get_pdf_output_dir(self) -> str:
         """获取PDF输出目录"""
-        return self.config.get(
-            "pdf_output_dir", "data/plugins/astrbot-qq-group-daily-analysis/reports"
-        )
+        try:
+            plugin_name = "astrbot_plugin_qq_group_daily_analysis"
+            data_path = get_astrbot_data_path()
+            default_path = data_path / "plugin_data" / plugin_name / "reports"
+            return self.config.get("pdf_output_dir", str(default_path))
+        except Exception:
+            # Fallback for older versions or import errors
+            return self.config.get(
+                "pdf_output_dir",
+                "data/plugins/astrbot_plugin_qq_group_daily_analysis/reports",
+            )
 
     def get_bot_qq_ids(self) -> list:
         """获取bot QQ号列表"""
diff --git a/src/utils/helpers.py b/src/utils/helpers.py
index e0fb3f0..1c175b4 100644
--- a/src/utils/helpers.py
+++ b/src/utils/helpers.py
@@ -3,6 +3,7 @@
 包含消息分析和其他通用功能
 """
 
+import asyncio
 from astrbot.api import logger
 
 from ...src.analysis.llm_analyzer import LLMAnalyzer
@@ -49,10 +50,14 @@ class MessageAnalyzer:
         """完整的消息分析流程"""
         try:
             # 基础统计
-            statistics = self.message_handler.calculate_statistics(messages)
+            statistics = await asyncio.to_thread(
+                self.message_handler.calculate_statistics, messages
+            )
 
             # 用户分析
-            user_analysis = self.user_analyzer.analyze_users(messages)
+            user_analysis = await asyncio.to_thread(
+                self.user_analyzer.analyze_users, messages
+            )
 
             # 获取活跃用户列表 - 使用get_top_users方法,limit从配置中读取
             max_user_titles = self.config_manager.get_max_user_titles()