CIMDA Care is a comprehensive digital companionship system designed for the elderly. It uses artificial intelligence to assist the elderly and meet the needs of exercise, entertainment, and daily life. The system covers four significant functions: medication reminder, exercise, entertainment, and chat. (1) The reminder function reminds the elderly to take medications with alarm clock prompts, which can indicate drug types, pictures, doses, etc.; (2) By using camera detection and artificial intelligence algorithms, the exercise function practicing patented three-dimensional human skeleton detection technology, providing exercise guidance, and also making suggestions for improving posture; (3) The entertainment function combines dynamic data analysis and animation to generate natural and vivid virtual characters and present dance steps with karaoke and music; (4) The chat function uses natural language processing technology to perform speech recognition, analyze human language data, and accompany the elderly to chat and interact.