The invention provides an implementation method of self-service trusteeship. Through APP reservation, a user enters a reserved self-service box body to complete the trusteeship of the user by the self-service box body after the user passes identity authentication on the reserved self-service box body. According to the invention, the space for rest and study of primary and secondary school studentsafter school can be provided, appointment and child supervision can be realized through an APP, and the trusteeship effect is achieved.