The invention discloses a motor control system and method. The motor control system is used for driving a motor, and comprises a first control sub system and a second control sub system; the first control sub system comprises a first controller and a first power source, wherein the first controller is connected with a first winding in the motor, and the first power source supplies power for the first controller; the second control sub system comprises a second controller and a second power source, wherein the second controller is connected with a second winding in the motor, and the second power source supplies power for the second controller; the first controller is directly connected with the second controller through a preset connecting mode; the first controller drives the motor to operate through the first winding in a first state, and sends a preset signal to the second controller through the preset connecting mode in a second state; and the second controller drives the motor to operate through the second winding when receiving the preset signal. The motor control system and method have the advantages that the first controller is directly connected with the second controller through the preset connecting mode, and therefore a load of a vehicle control unit (VCU) does not need to be occupied.