Abstract: With the aging of the population together with the acceleration of migration and the widespread “emptynest” phenomenon, it is very important to construct a longterm system of care service for the elderly. It is an issue that concerns not only the family, but also society, the economic market and political situations. This paper comprehensively analyses the origin of the demand for longterm care, and then claims to create a “fourdimensionspace” to meet the needs of the elderly.