The present invention discloses an intelligent sleep system and a working method thereof. The system comprises a man-machine interaction platform, an information collection system, a central server and a building home device system. The man-machine interaction platform is taken as a media for information communication between a user and system and is configured to allow the user to issue a commandto the system and obtain sleep related data and suggestion. The information collection system is configured to collect environment parameters and the user's body parameters through an environment sensor and an intelligent wearable device. The central server performs interactions with other three portions, and the central server receives the user's command issued by the man-machine interaction platform to combine the data collected by the information collection system to perform linked motion command for the building home device. The building home device system performs regulation of the indoor temperature and humidity and the light condition corresponding to the requirement of the central server. The intelligent sleep system and the working method thereof can provide continuous optimization for users, are customized for users, can provide a highly intelligent sleep environment and can ensure the high-quality sleep for users so as to improve the working and learning efficiency and boost immunity.