Community-based day care service is supplied to not only the elderly but also family caregivers. In a day care center, the elderly would receive professional care and service in the daytime ,and would return home to reunite with their families at night. This service can help the elderly to age in place and at home. Besides, day care service can help family caregivers alleviate their care burden of physical, mental, social, etc. levels. Furthermore, it can not only help family caregivers continue to work instead of quitting their jobs but also provide respite for them. The research adopts document analysis, futures triangle and double variable scenario method to research: 1.The effect of community-based day care service on the elderly and family caregivers 2.The advantages and disadvantages of community-based day care service 3.The future images of community-based day care service and family caregivers