Aiming at requirements for the development of smart meters, the application of RF CPU card charge-control system based on MFRC523 chip in smart meters is introduced in this paper. The principles of the charge control system and its structure are briefly illustrated, and its characteristics and advantages as well as its software and hardware design are highlighted. It enables the charge-control smart meter to respond faster, more accurate, communicate more stable, and use more convenient, which is highly innovative and practical.