The invention relates to a boosting brake system. The boosting brake system comprises a brake motor (10), a transmission system (20), a pedal mechanism (40) and a master brake cylinder (30), wherein the brake motor (10) is connected with a piston (31) of the master brake cylinder (30) by the transmission system (20). The boosting brake system also comprises a controller, a first displacement sensor (51) and a second displacement sensor (52), wherein the first displacement sensor (51) and the second displacement sensor (52) are respectively installed on the pedal mechanism (40) and the transmission system (20), and the controller controls the running of the brake motor (10) by comparing the output signals of the first displacement sensor (51) and the second displacement sensor (52), so that the power of the brake motor (10) is output by the transmission system (20) and pushes the piston (31) so as to realize boosting to brake. The boosting brake system is especially suitable for a hybrid electric vehicle and an electric vehicle.