Disclosed herein are a pressure control apparatus and a pressure control method thereof. The pressure control apparatus includes an input unit configured to receive an input of a current pressure value of a brake apparatus detected by a detection apparatus when drive of the brake apparatus is prepared, a determination unit configured to determine whether the input current pressure value is a preset standard pressure value, and a control unit configured to receive the current pressure value, transfer a determination command to the determination unit, transfer a hydraulic adjustment command to the brake apparatus so that the current pressure value reaches the standard pressure value when the current pressure value is not the standard pressure value, and cause an on/off operation of the brake apparatus to be iterated a predetermined number of times for a predetermined time.