ELECTRICAL PARKING BRAKE SYSTEM AND CONTROL METHOD THEREOF

In an electrical parking brake system and a control method thereof, the electrical parking brake system includes: a vehicle control unit electrically connected to a shift by wire of a vehicle, and configured to receive a shift command entered by a driver from the shift by wire, and periodically transmitting a parking request signal at a predetermined transmission time interval; a main parking brake controller electrically connected to the vehicle control unit through a first communication channel and a second communication channel, and configured to execute a main parking brake control based on the parking request signal received from the vehicle control unit; and an auxiliary parking brake controller electrically connected to the vehicle control unit through the first communication channel and a third communication channel, and configured to execute an auxiliary parking brake control based on the parking request signal received from the vehicle control unit.