Abstract: Abstract: Because of fewer sources of students, almost half of middle and primary schools, which are mostly located in rural communities, become unused, with the efficiency of school reuse being not high. For purpose of reaching efficient reuse of unused schools, this paper uses the “big” time environment of population boom since the foundation of the state and rural demographic trends after reform and opening up, combines the “big” space environment of rural public service facilities establishment, proposes several issues, such as, demands of left-behind elderly and children need to be take into account for reuse of schools left unused, rural China speeds up facilities construction, overall urban-rural development, etc. Besides, some examples are adopted to refine reuse into forms such as nursing home, cultural funfair, home for left behind children, comprehensive community service center, etc, related to community retirement, medical treatment and culture experience.