As the society is getting aged, the living and care problems for the elderly has become an important subject in country development. In order to carry out the ideal of “aging in place” and continue the old living style of the elderly in community, Day Service Center (DSC) for the elderly is anticipated to cost down the longterm care cost and prolong the lifespan of the elderly to live in community as long as possible. So the architectural planning and space design of DSC for the elderly is a critical task to being implemented community-base care in the future. In order to carry out the ideal of aging in place and continue the old living style of the elderly in community, so the architectural planning and space design of Day Service Center for the elderly is an important task to carry out community-base care in the future. Nowadays the majority of DSC for the elderly in Taiwan is “mixed care type,” which located the people with handicapped and with dementia together. Empirical research can be employed to modify design hypotheses. Based on this background, this research try to focusing on the reacted-relations among user, behavior and space, by the concept of time geography, this research will occur a observation by survey method of behaviormapping for the elderly in day service Center, by tracing the behavior contents, activity types and using spaces of the elderly, trying to compare and break down the characteristics of using behavior and differences of new and old environmental context. There are three main purposes in this study: 1) To compare the differences behaviors of the elderly between two different environmental context, before and after environmental transfer of Day Service Center; 2) To analyze the differences of stay spot, time, frequency and reactions with another for the elderly in different health conditions; 3) Try to conclude the impact factors of activity and behavior pattern of the elderly, and hand out some suggestions on spatial designs of common space and layout of the Day Service Center in the future. At the result, we found that activities participating type of the elderly in “Mix user” type DSC should be divided into ‘decision making by himself,’ ‘partly choice,’ and ‘arrangement by DSC’ three types. And interpersonal relationship behaviors should be divided into ‘positive-active,’ and ‘negative-passive’ two types. Finally, for answering the variety needs and activities scale of the elderly, and allow complex activities to occur in we same space, we suggest the activity room of “Mix user” type DSC should be designed with different atmospheres and furnishings. Besides the common curriculum of Day Service Center for the elderly for the handicapped and dementia elderly, should be with more flexibility and allow some free choices for users in the future.