Traditional RFID charging system which uses RS-485 has the disadvantage of lower real-time and communication efficiency. So a new RFID charging system based on CAN bus and 2.4G wireless network is come up with. One CAN node can control the data transmission of six RFID terminals through the 2.4G wireless network. The system is tested by transmitting data from the temperature sensor through wireless network and the result proves the correctness of this design.