The invention discloses a servocontrol system for an on-chip motor, which comprises a processing system, a system port and a motor driving system. The processing system is connected with a motor driving circuit through a system port circuit, the motor driving system is connected with the motor, and the motor control instruction can be generated by the processing system and then can be sent to the motor driving system so as to drive and control the motor, the system port circuit can achieve communication function with other outside devices simultaneously, and can transmit the status message of the motor which is collected by the motor driving system to the processing system. The control system can achieve the data control of various motor systems only through replacing the power MOS tube, and also achieve multi-channel control signal output.