The invention provides a control module used for controlling a compressor. The compressor comprises a compression mechanism, a shaft connected with the compression mechanism, and a motor comprising a stator and a rotor. The rotor is connected with the shaft so as to drive the shaft to rotate. The control module is connected with the motor. The control module is configured in the mode that when the motor operates normally, the control module controls an inverter to provide alternating currents for the motor, and when the motor operates at a low speed and/or the motor approaches shutdown, the control module controls the inverter to provide direct currents for the motor. Besides, the invention provides a compressor control method.