The invention discloses a monitoring system and method for the braking state of a haulage motor wheel disc. The monitoring system comprises a brake device which comprises a brake disc and a brake pad. The monitoring system further comprises pressure sensors used for acquiring pressure data between the brake disc and the brake pad, a logic processing unit for receiving the data acquired by the pressure sensors and judging the braking state of a haulage motor according to a preset logic algorithm and a braking displayer connected with the logic processing unit and used for receiving and displaying the braking state. Through acquisition of the pressure data between the brake disc and the brake pad, especially when multiple pressure sensors are arranged, the real condition of the brake pad acting on the brake disc can be accurately judged through the logic processing unit according to the pressure data acquired by the pressure sensors in different positions, all the data are displayed through the braking displayer to be checked by operators conveniently, corresponding operation is performed by the operators, and therefore the purposes that the braking state of the haulage motor is truly monitored and optimization and control are performed are achieved.