Assuming the introduction of the departmentalized classroom system to conduct by the grade unit, the school building of M municipality M Junior High School was planned and was built. Features of the building are that departmentalized classrooms, multi-purpose space and teacher station for exclusive use of the grade unit are installed. We analyzed various effects and problems in school management and the school life through the inventory survey for teachers and students. As the result, the purpose-built school building for the special system inspected that it functioned effectively.