This study explores the research on the reuse of idle space (classrooms) in the country and evaluates the possibility of combining day care centers with classrooms. Understand today's declining birthrate problem and the serious aging problem of the population year by year, investigate and analyze the current population of Kaohsiung City, the number of vacant space (classrooms), and Kaohsiung City Day Care Center branch, organization profile, and the number of elderly people. After the investigation and analysis, an interview was made with each day care center on its internal space usage, space size, and space requirements in order to facilitate the research on the reuse of the country's small unused space (classrooms). If we can effectively use the idle space (classrooms) at the national level, we will be able to significantly cooperate with the government's "Long-Term Care for Decade Plan 2.0" so that care for older people can be more universalized.