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Controller area network (CAN) is one of the popular networks with the international standard, and adopted mostly on the vehicle. The application of CAN communication in more and more vehicles had led to requirements that the assignment of message identifiers to communication be standardized for certain application. SAE J1939 was designed to allow electronic devices from different vendors to communicate with each other through a standard architecture. The SAE J1939 communication protocol had been implementation in electric city bus used microchip V85070F3239 embedded CAN controller. The CAN network protocol used on electric city bus was established and an implementation method was put forward. The identification bit of data for the vehicle controller was presented in accordance with J1939 protocol. The communication process for them was also given based on CANoe platform. The CAN protocol and controller have been used on a pure electric city bus and work well.