Disclosed is an electronic parking brake (EPB) system. The EPB system has an EPB actuator operated by an electric motor, and the EPB system includes a motor driver configured to drive the electric motor of the EPB actuator; a current sensor configured to sense a current flowing in the electric motor; a voltage sensor configured to sense a voltage supplied to the electric motor; and an electronic control unit (ECU) configured to change a target current to correspond to a parking apply mode that is executed on the basis of a voltage supplied to the electric motor, which is sensed through the voltage sensor when the parking apply mode is executed, and control an operation of the electric motor according to the changed target current.