Brake system and controlling method thereof

A brake system may include: a first motor providing a driving force to a first electronic parking brake; a first drive circuit and a second drive circuit each independently connected to the first motor, and driving the first motor; a first switch circuit connected between the first motor and the first drive circuit; a second switch circuit connected between the first motor and the second drive circuit; a first micro controller unit electrically connected to the first drive circuit; and a second micro controller unit electrically connected to the second drive circuit.