"Peace of Mind" Heart Online is a social platform that strengthens connections and communication between the elderly and their families or relatives. Through the most simplified images and procedures, it is hoped to be more suitable for the use of elderly people with different abilities. Its functions include real-time video calls , audio or video transmission, emotion assessment, life information and location inquiry, etc. The platform hopes to use the above functions to allow the elderly to stay connected with their family, relatives and friends through video or audio, regardless of environmental, regional and social emergencies. Through the platform, family members, relatives and friends can also understand the elder's recent emotional state and contact the elder for support at any time.