The invention discloses a motor system with the common-mode interference reduction capacity. The motor system comprises a motor, a direct-current power supply, a bridge type inverter, a controller and one to two chopping switches. Two chopping switches can be simultaneously controlled by the motor system, the maximum value and the minimum value of common-mode voltage of the motor can be reduced, changes of the common-mode voltage can be reduced to the maximum extent, and the electromagnetic compatibility of the system is improved. When only one chopping switch tube is selectively controlled, the maximum value or the minimum value of the common-mode voltage of the motor can also be reduced, and thus cost can be reduced on the premise that the common-mode interference of the motor is reduced. The control strategy can be implemented just by conducting simple modification on a common motor driving system so that the motor system can be fast applied easily, the common-mode interference problem is fast solved, and the electromagnetic compatibility of the system is improved. Therefore, the motor system is easy and convenient to implement and high in practicality.