A global-function one-card control system comprises a radiofrequency card carried and used by a user, a radiofrequency card reader and a controller. The radiofrequency card reader is connected with the controller in two ways, the radiofrequency card is wirelessly connected with the radiofrequency card reader, the radiofrequency card reader comprises a close radiofrequency card reader and a remote radiofrequency card reader, the close radiofrequency card reader is connected with an entrance guard controller, an elevator controller, a parking lot barrier controller, a bathhouse water-saving controller and the like, the entrance guard controller, the elevator controller, the parking lot barrier controller and the bathhouse water-saving controller can respectively closely control entrance guard equipment, elevator equipment, parking lot barrier equipment, bathhouse water-saving equipment and the like, and the remote radiofrequency card reader can be connected with a controller which can remotely control electrical equipment, gas equipment, heating equipment, water supply equipment and the like. The global-function one-card control system is convenient in use, small in size and wide in application range.