The technology integrates local management, vehicle information management and human-machine interface and communication expansion interface. It is first to achieve electric-vehicle network cabling, self-definition of vehicle CAN bus communication protocol. it successfully integrates comprehensive control of entire electric vehicle. The technology solves two problems: First, how to manage vehicle limited energy most effectively. Estimating remaining battery charge and vehicle driving range, battery temperature control, power distribution of energy-intensive parts is addressed by the technology; second,how to solve the problems such as fault diagnosis during vehicle operation, high pressure safety, charging communication interface, battery life extension and improving reliability of the electric vehicles.