Modern distance education is an important form of adult higher education, and has become an important part of higher education in china. Off campus learning center is a support institution for the study of Modern Distance Education in Colleges and universities. Comprehensive evaluation of off-campus learning centers is an important means of strengthening the management of off-campus learning centers. The students’achievement as one of the comprehensive evaluation indicators of the off-campus learning center can better reflect the comprehensive ability of the management and service of the off-campus learning center. This paper applies the students’achievements in the learning process and the TOPSIS method and the grey correlation to the comprehensive analysis and ranking of the off-campus learning center, so as to provide the feasible method and theoretical basis for the students' academic achievement as the evaluation index of the off-campus learning center.