This paper mainly discusses the combination of campus card and smart meter, using the electricity meter itself with the functions of electric energy metering, realtime monitoring, automatic control, information exchange and data processing, and the powerful Internet of Things technology, and effectively using network technology Card deductions, and the corresponding costs into electricity to charge the meter. This function not only effectively solves the problem of prepaid charging, saving time for payment, making payment more convenient, but also ensures that the realtime power supply for the financial management has also brought convenience.