Through practical investigation and research of the elderly care institution,this paper summarized the existing problems and analyzed the needs of dementia elderly and their caregivers.Taking the behavior characteristics of dementia elderly,which includes tending to wander and gather,into consideration,the paper proposed to adopt nostalgic therapy at the end of indoor space.It separates the elderly in the public living room into small groups to narrow the group scale and improve the utilization rate of the overall space of the institutions.The method enables the institution to have more public...