The invention provides an energy consumption optimization method and device for electric equipment of a motor train unit and an intelligent energy management system. The method comprises the followingsteps: acquiring operating condition data of the motor train unit, a current operating mode of the motor train unit and corresponding relation data of the rotating speed, the torque and the efficiency of a traction motor of the motor train unit; obtaining a corresponding energy consumption optimization control strategy according to the motor train unit operation condition data, the current operation mode of the motor train unit and the corresponding relation data of the rotating speed, the torque and the efficiency of the traction motor of the motor train unit; and controlling the operation of the motor train unit equipment according to the energy consumption optimization control strategy. The energy consumption of the motor train unit equipment can be accurately measured, energy consumption optimization is carried out according to measurement data of the energy consumption of the motor train unit equipment, energy consumption optimization strategies under different modes are provided, energy is effectively saved, and the operation economy of the motor train unit is improved.