With the increasing aging of the population, helping the elderly to integrate into digital life has become an important part of coping with this trend. The digital quality of life for seniors has improved significantly, however, the adoption rate of smart wearables among seniors is still relatively low. Compared with the diversified and personalized needs of the elderly, there are problems such as inconsistent demand for wearable devices for the elderly. In order to better understand the needs of elderly users for wearable devices, this study adopts the user participation research method, conducts in-depth research on wearable devices for the elderly, and builds a multi-terminal device interconnection system design for elderly users.