The development of library automation in Mainland China beganin the 1970's. Through 10 years' experiments (1975-1985), its real application was carried out in 1986. This article describes theexperiences and processes of three kinds of library automationsystems, including public library system, university library system andtechnology research library system. Finally the author makes somecritical comments and proposes future prospects on the library automation in Mainland China.