This research is questionnaire of the base maintenance of the housing and equipment for the aged. There are five kinds of research solvers, Housing makers, Housing equipment makers, Life requisites makers, Researcher in architect, Generally persons. The research for the aged on the housing industry, can be classified into three main groups. a) study on the development products and marketing b) study on the research and development c) study on the actual situation of the sales about the products. Conclusion: Makers' activities synchronize with policy of the government. Opinions vary differ as to the cause of the sales result, between good sales makers and bad sales makers. User research is the matter of great importance for the aged on the housing industry.