diff --git a/src/application/services/analysis_application_service.py b/src/application/services/analysis_application_service.py
index 69ca8bf..98e133c 100644
--- a/src/application/services/analysis_application_service.py
+++ b/src/application/services/analysis_application_service.py
@@ -1,22 +1,27 @@
 """
 分析应用服务 - 应用层
-实现“每日群聊分析并生成报告”的核心用例。
+实现"每日群聊分析并生成报告"及"增量分析"核心用例。
 负责协调领域服务、基础设施适配器及持久化层。
 """
 
 import asyncio
+import datetime as dt
+from collections import defaultdict
 from typing import Any
 
 from ...domain.models.data_models import TokenUsage
 from ...domain.repositories.analysis_repository import IAnalysisProvider
 from ...domain.repositories.report_repository import IReportGenerator
 from ...domain.services.analysis_domain_service import AnalysisDomainService
+from ...domain.services.incremental_merge_service import IncrementalMergeService
 from ...domain.services.statistics_service import StatisticsService
+from ...domain.value_objects.unified_message import UnifiedMessage
+from ...infrastructure.persistence.incremental_store import IncrementalStore
 from ...utils.logger import logger
 
 
 class AnalysisApplicationService:
-    """分析应用服务 - 协调业务流程"""
+    """分析应用服务 - 协调业务流程（每日分析 + 增量分析）"""
 
     def __init__(
         self,
@@ -27,6 +32,8 @@ class AnalysisApplicationService:
         llm_analyzer: IAnalysisProvider,
         statistics_service: StatisticsService,
         analysis_domain_service: AnalysisDomainService,
+        incremental_store: IncrementalStore | None = None,
+        incremental_merge_service: IncrementalMergeService | None = None,
     ):
         self.config_manager = config_manager
         self.bot_manager = bot_manager
@@ -35,6 +42,8 @@ class AnalysisApplicationService:
         self.llm_analyzer = llm_analyzer
         self.statistics_service = statistics_service
         self.analysis_domain_service = analysis_domain_service
+        self.incremental_store = incremental_store
+        self.incremental_merge_service = incremental_merge_service
 
     async def execute_daily_analysis(
         self, group_id: str, platform_id: str | None = None, manual: bool = False
@@ -167,3 +176,388 @@ class AnalysisApplicationService:
             "messages_count": len(unified_messages),
             "adapter": adapter,
         }
+
+    # ----------------------------------------------------------------
+    # 增量分析用例
+    # ----------------------------------------------------------------
+
+    async def execute_incremental_analysis(
+        self, group_id: str, platform_id: str | None = None
+    ) -> dict[str, Any]:
+        """
+        执行一次增量分析用例。
+
+        与每日分析不同，增量分析每次仅处理最近一段时间的消息，
+        提取少量话题和金句，将结果合并到当天的累积状态中。
+        不生成用户称号（留到最终报告时再做），不生成报告。
+
+        流程：
+        1. 获取适配器
+        2. 拉取消息（使用增量配置的 max_messages）
+        3. 清理消息
+        4. 按时间戳去重：过滤已分析过的消息
+        5. 检查最小消息阈值
+        6. 计算基础统计（小时分布、用户活跃、表情）
+        7. LLM 增量分析（仅话题 + 金句）
+        8. 构建合并参数并合并到 IncrementalState
+        9. 持久化状态
+        10. 返回批次结果
+
+        Args:
+            group_id: 群组 ID
+            platform_id: 平台标识，缺省为默认
+
+        Returns:
+            dict: 包含 success、batch_record、state_summary 等信息
+        """
+        if not self.incremental_store:
+            raise RuntimeError("增量分析未初始化：缺少 IncrementalStore")
+
+        logger.info(f"开始增量分析用例: 群 {group_id}, 平台 {platform_id or '默认'}")
+
+        # 1. 获取适配器
+        adapter = self.bot_manager.get_adapter(platform_id)
+        if not adapter:
+            raise ValueError(f"未找到平台 {platform_id} 的适配器")
+
+        # 2. 拉取消息（使用增量配置的消息数量上限）
+        days = self.config_manager.get_analysis_days()
+        max_count = self.config_manager.get_incremental_max_messages()
+
+        raw_messages = await adapter.fetch_messages(
+            group_id=group_id, days=days, max_count=max_count
+        )
+
+        if not raw_messages:
+            logger.warning(f"群 {group_id} 增量分析：无法获取消息")
+            return {"success": False, "reason": "no_messages"}
+
+        # 3. 清理消息
+        from ...domain.services.message_cleaner_service import MessageCleanerService
+
+        cleaner = MessageCleanerService()
+        bot_self_ids = self.config_manager.get_bot_self_ids()
+        unified_messages = cleaner.clean_messages(
+            raw_messages, bot_self_ids=bot_self_ids, filter_commands=True
+        )
+
+        # 4. 获取当天增量状态并按时间戳去重
+        today_str = dt.datetime.now().strftime("%Y-%m-%d")
+        state = await self.incremental_store.get_or_create_state(group_id, today_str)
+
+        if state.last_analyzed_message_timestamp > 0:
+            unified_messages = [
+                msg
+                for msg in unified_messages
+                if msg.timestamp > state.last_analyzed_message_timestamp
+            ]
+
+        # 5. 检查最小消息阈值
+        min_messages = self.config_manager.get_incremental_min_messages()
+        if len(unified_messages) < min_messages:
+            logger.info(
+                f"群 {group_id} 增量分析：新消息数 ({len(unified_messages)}) "
+                f"未达到阈值 ({min_messages})，跳过本次分析"
+            )
+            return {"success": False, "reason": "below_threshold"}
+
+        # 6. 计算基础统计
+        statistics = await asyncio.to_thread(
+            self.statistics_service.calculate_group_statistics, unified_messages
+        )
+        user_activity = await asyncio.to_thread(
+            self.analysis_domain_service.analyze_user_activity,
+            unified_messages,
+            bot_self_ids,
+        )
+
+        # 计算本批次的小时分布
+        hourly_msg_counts, hourly_char_counts = self._compute_hourly_counts(
+            unified_messages
+        )
+
+        # 7. LLM 增量分析（仅话题 + 金句）
+        topics_per_batch = self.config_manager.get_incremental_topics_per_batch()
+        quotes_per_batch = self.config_manager.get_incremental_quotes_per_batch()
+
+        # 需要将 UnifiedMessage 转换为 legacy 格式供 LLM 分析器使用
+        legacy_messages = self.statistics_service._convert_to_legacy_dict(
+            unified_messages
+        )
+        unified_msg_origin = (
+            f"{platform_id}:GroupMessage:{group_id}" if platform_id else group_id
+        )
+
+        topics, golden_quotes, token_usage = (
+            await self.llm_analyzer.analyze_incremental_concurrent(
+                legacy_messages,
+                umo=unified_msg_origin,
+                topics_per_batch=topics_per_batch,
+                quotes_per_batch=quotes_per_batch,
+            )
+        )
+
+        # 8. 构建合并参数
+        # 8a. 转换话题: SummaryTopic -> dict
+        new_topics = [
+            {"topic": t.topic, "contributors": t.contributors, "detail": t.detail}
+            for t in topics
+        ]
+
+        # 8b. 转换金句: GoldenQuote -> dict
+        new_quotes = [
+            {
+                "content": q.content,
+                "sender": q.sender,
+                "reason": q.reason,
+                "user_id": q.user_id,
+            }
+            for q in golden_quotes
+        ]
+
+        # 8c. 转换 token 消耗: TokenUsage -> dict
+        token_usage_dict = {
+            "prompt_tokens": token_usage.prompt_tokens,
+            "completion_tokens": token_usage.completion_tokens,
+            "total_tokens": token_usage.total_tokens,
+        }
+
+        # 8d. 转换用户统计: AnalysisDomainService 格式 -> IncrementalState 格式
+        user_stats = self._convert_user_activity_for_merge(
+            user_activity, unified_messages
+        )
+
+        # 8e. 转换表情统计: EmojiStatistics -> dict
+        emoji_stats = {
+            "face_count": statistics.emoji_statistics.face_count,
+            "mface_count": statistics.emoji_statistics.mface_count,
+            "bface_count": statistics.emoji_statistics.bface_count,
+            "sface_count": statistics.emoji_statistics.sface_count,
+            "other_emoji_count": statistics.emoji_statistics.other_emoji_count,
+            "face_details": statistics.emoji_statistics.face_details,
+        }
+
+        # 8f. 获取参与者 ID 和最后消息时间戳
+        participant_ids = {msg.sender_id for msg in unified_messages}
+        last_message_timestamp = max(
+            (msg.timestamp for msg in unified_messages), default=0
+        )
+
+        # 8g. 计算本批次总字符数
+        characters_count = sum(msg.get_text_length() for msg in unified_messages)
+
+        # 9. 合并到增量状态
+        batch_record = state.merge_batch(
+            messages_count=len(unified_messages),
+            characters_count=characters_count,
+            hourly_msg_counts=hourly_msg_counts,
+            hourly_char_counts=hourly_char_counts,
+            user_stats=user_stats,
+            emoji_stats=emoji_stats,
+            new_topics=new_topics,
+            new_quotes=new_quotes,
+            token_usage=token_usage_dict,
+            last_message_timestamp=last_message_timestamp,
+            participant_ids=participant_ids,
+        )
+
+        # 10. 持久化状态
+        await self.incremental_store.save_state(state)
+
+        logger.info(
+            f"群 {group_id} 增量分析完成: "
+            f"本批次消息={len(unified_messages)}, "
+            f"新话题={len(new_topics)}, 新金句={len(new_quotes)}, "
+            f"累计分析次数={state.total_analysis_count}"
+        )
+
+        return {
+            "success": True,
+            "batch_record": batch_record.to_dict(),
+            "state_summary": state.get_summary(),
+            "messages_count": len(unified_messages),
+        }
+
+    async def execute_incremental_final_report(
+        self, group_id: str, platform_id: str | None = None
+    ) -> dict[str, Any]:
+        """
+        基于当天增量累积状态生成最终报告。
+
+        将一天内多次增量分析积累的话题、金句、统计数据汇总，
+        额外执行用户称号分析（需要完整的累积数据），然后生成
+        与传统每日分析格式完全一致的 analysis_result。
+
+        流程：
+        1. 加载当天增量状态
+        2. 检查状态有效性
+        3. 执行用户称号 LLM 分析（基于累积数据）
+        4. 使用 IncrementalMergeService 构建 analysis_result
+        5. 持久化到 history_manager
+        6. 返回结果
+
+        Args:
+            group_id: 群组 ID
+            platform_id: 平台标识，缺省为默认
+
+        Returns:
+            dict: 包含 success、analysis_result、adapter 等信息
+        """
+        if not self.incremental_store or not self.incremental_merge_service:
+            raise RuntimeError(
+                "增量分析未初始化：缺少 IncrementalStore 或 IncrementalMergeService"
+            )
+
+        logger.info(f"开始增量最终报告: 群 {group_id}, 平台 {platform_id or '默认'}")
+
+        # 1. 加载当天增量状态
+        today_str = dt.datetime.now().strftime("%Y-%m-%d")
+        state = await self.incremental_store.get_state(group_id, today_str)
+
+        # 2. 检查状态有效性
+        if not state or state.total_analysis_count == 0:
+            logger.warning(
+                f"群 {group_id} 无当天增量分析数据，无法生成最终报告"
+            )
+            return {"success": False, "reason": "no_incremental_data"}
+
+        # 3. 获取适配器（报告发送需要）
+        adapter = self.bot_manager.get_adapter(platform_id)
+        if not adapter:
+            raise ValueError(f"未找到平台 {platform_id} 的适配器")
+
+        # 4. 执行用户称号 LLM 分析
+        user_titles = []
+        user_title_enabled = self.config_manager.get_user_title_analysis_enabled()
+
+        if user_title_enabled and state.user_activities:
+            max_user_titles = self.config_manager.get_max_user_titles()
+            # 从累积的 user_activities 中取出 top 用户
+            top_users = state.get_user_activity_ranking(max_user_titles)
+
+            # 准备用户称号分析所需的 legacy 消息格式
+            # 因为增量模式不保存原始消息，这里用空列表
+            # 用户称号分析器主要依赖 user_analysis 和 top_users，消息内容非必需
+            unified_msg_origin = (
+                f"{platform_id}:GroupMessage:{group_id}"
+                if platform_id
+                else group_id
+            )
+
+            try:
+                user_titles_result, title_token_usage = (
+                    await self.llm_analyzer.analyze_user_titles(
+                        messages=[],  # 增量模式下不传原始消息
+                        user_analysis=state.user_activities,
+                        umo=unified_msg_origin,
+                        top_users=top_users,
+                    )
+                )
+                user_titles = user_titles_result
+
+                # 将称号分析的 token 消耗追加到状态中
+                state.total_token_usage["prompt_tokens"] = (
+                    state.total_token_usage.get("prompt_tokens", 0)
+                    + title_token_usage.prompt_tokens
+                )
+                state.total_token_usage["completion_tokens"] = (
+                    state.total_token_usage.get("completion_tokens", 0)
+                    + title_token_usage.completion_tokens
+                )
+                state.total_token_usage["total_tokens"] = (
+                    state.total_token_usage.get("total_tokens", 0)
+                    + title_token_usage.total_tokens
+                )
+                await self.incremental_store.save_state(state)
+            except Exception as e:
+                logger.error(f"增量最终报告用户称号分析失败: {e}", exc_info=True)
+
+        # 5. 构建 analysis_result
+        analysis_result = self.incremental_merge_service.build_analysis_result(
+            state, user_titles
+        )
+
+        # 6. 持久化到 history_manager
+        await self.history_manager.save_analysis(group_id, analysis_result)
+
+        logger.info(
+            f"群 {group_id} 增量最终报告完成: "
+            f"累计消息={state.total_message_count}, "
+            f"话题={len(state.topics)}, 金句={len(state.golden_quotes)}, "
+            f"批次={state.total_analysis_count}"
+        )
+
+        return {
+            "success": True,
+            "analysis_result": analysis_result,
+            "messages_count": state.total_message_count,
+            "adapter": adapter,
+        }
+
+    # ----------------------------------------------------------------
+    # 辅助方法
+    # ----------------------------------------------------------------
+
+    @staticmethod
+    def _compute_hourly_counts(
+        messages: list[UnifiedMessage],
+    ) -> tuple[dict[int, int], dict[int, int]]:
+        """
+        从消息列表计算按小时的消息数和字符数分布。
+
+        Args:
+            messages: 统一格式的消息列表
+
+        Returns:
+            tuple: (每小时消息计数, 每小时字符计数)
+        """
+        hourly_msg: dict[int, int] = defaultdict(int)
+        hourly_char: dict[int, int] = defaultdict(int)
+
+        for msg in messages:
+            hour = dt.datetime.fromtimestamp(msg.timestamp).hour
+            hourly_msg[hour] += 1
+            hourly_char[hour] += msg.get_text_length()
+
+        return dict(hourly_msg), dict(hourly_char)
+
+    @staticmethod
+    def _convert_user_activity_for_merge(
+        user_activity: dict[str, dict],
+        messages: list[UnifiedMessage],
+    ) -> dict[str, dict]:
+        """
+        将 AnalysisDomainService.analyze_user_activity() 的返回格式
+        转换为 IncrementalState.merge_batch() 所需的 user_stats 格式。
+
+        转换映射：
+        - nickname -> name
+        - hours (defaultdict) -> active_hours (list)
+        - 新增 last_message_time（从消息时间戳中提取）
+
+        Args:
+            user_activity: AnalysisDomainService 返回的用户活跃数据
+            messages: 本批次的消息列表（用于提取每个用户的最后发言时间）
+
+        Returns:
+            dict: IncrementalState.merge_batch() 所需的 user_stats 格式
+        """
+        # 预先计算每个用户的最后消息时间戳
+        user_last_time: dict[str, int] = {}
+        for msg in messages:
+            current = user_last_time.get(msg.sender_id, 0)
+            if msg.timestamp > current:
+                user_last_time[msg.sender_id] = msg.timestamp
+
+        result: dict[str, dict] = {}
+        for user_id, stats in user_activity.items():
+            result[user_id] = {
+                "name": stats.get("nickname", user_id),
+                "message_count": stats.get("message_count", 0),
+                "char_count": stats.get("char_count", 0),
+                "emoji_count": stats.get("emoji_count", 0),
+                "active_hours": list(stats.get("hours", {}).keys()),
+                "last_message_time": user_last_time.get(user_id, 0),
+            }
+
+        return result