This paper proposes and designs an all-round, multi-dimensional artificial intelligence-based smart elderly care system around the problem of accompanying the elderly at home. Its main goal is to realize real-time monitoring of the life of the elderly and the capture of emotional fluctuations. When the system detects abnormal conditions such as the fall of the elderly, it will immediately send out an alarm and notify the relevant guardians. By integrating voice interaction technology, the system can recognize and understand the tone and emotions of the elderly, analyze the psychological state of the elderly and provide timely communication and comfort to help the elderly adjust their emotions and improve their quality of life. The system has set up a memo function to provide reminders for daily life, such as drinking water and exercising, so as to maintain the healthy living habits and physical condition of the elderly. The life of the elderly is relatively simple, and it is difficult to spend a lot of free time. The system has designed a VR experience hall, which has a variety of entertainment experiences such as virtual tourism, interactive games, virtual shopping , and virtual chatting . The system also uses big data visualization technology to collect and analyze the health indicators, living conditions and mental outlook of the elderly in real time, and display them in the form of trend graphs, so that the physical and mental conditions of the elderly can be fully grasped. The goal of this system is to change the traditional concept of "care for the aged" and promote the new concept of "enjoy the old".