Currently, the school-age population is rapidly decreasing due to the shrinking population and aging population, one of the nation's most serious problems. The consolidation and closure of small schools are increasing due to the decrease in the number of school-age population, and "integrated schools" are drawing attention as an alternative to this. About 100 integrated operating schools have been operated so far, and related research and guidance development are actively underway. However, domestic integrated schools are found to have problems such as inconvenience in using shared spaces, lack of mutual exchanges and formal integration. Therefore, this study aims to summarize the problems of the integrated operation school and suggest implications for efficient facility sharing and separation through case analysis abroad. First of all, the problems of integrated schools in Korea will be settled through prior research. Next, the case analysis was conducted based on the characteristics of deployment, functional characteristics, space elements for joint use, and the joint use of student community spaces.