This article introduces the design of umbrella renting machine based on SCM STC89C52 with the bike’s design concept, in order to avoiding the trouble of sudden heavy rain if people forget to bring their umbrellas, providing convenience for teachers and students in school. It also applies to other public facilities. The design uses SCM STC89C52 as controller, PN532 contactless RF card as information acquisition unit. It controls the stepping motor to achieve the opening and closing of the lock.The design is simple, bringing personalized learning and working environment of the campus with certain applications.