The invention provides a motor control system and method. A motor is used for controlling the rotation of a 4D probe. The system comprises a probe control module circuit for collecting probe detection parameters in real time and transmitting the probe detection parameters to an upper computer. The system also comprises a motor control module circuit which is used for driving the motor to rotate. The motor control module circuit and the probe control module circuit are two independent circuit boards. A probe control module transmits the motor rotation control instruction transmitted by the upper computer to the motor control module, so as to drive the motor to rotate. According to the invention, the probe control module carries out the forwarding of the motor rotation control instruction, and the rotation of the motor and the collection of the probe detection parameters are controlled by the probe control module, thereby enabling the time difference between the rotation of the motor and the receiving and transmitting of the probe detection parameters to be unique, guaranteeing the consistency of the swinging angle of a probe with the imaging angle, and improving the imaging precision.