We often participate in tens of, if not hundreds of, group chat via IM apps (discord, wechat, telegram, ...) and are not able to follow all the topics being discussed. It would be of great help if there is a tool that can summarize it for us, once a day. ChatSummary bot is a tool that can be added into any group chats and records messages continuously. At the end of each day, it will generate a report of all the hot topics today, along with the time it happened, the summary of the topic, and noteworthy contents in this topic. This helps you to quickly and efficiently gather information from your social circle.