A detection method for elevator brake moment operated through a system consisting of a controller, a motor encoder and a frequency converter, wherein the method comprises the following steps:. Initiating an automatic detection function to enter a step of elevator running state detection;. Determining, by the controller, whether the elevator is in an idle state; if not, performing the detection till the elevator enters the idle state; and if so, proceeding to the next step;. Controlling, by the controller, the frequency converter to continuously output stagewise-changing torque current to a motor while retaining a brake to be turned off; meanwhile, detecting, by the encoder, whether the motor rotates, and if so, feeding a signal back to the controller, recording the torque during the rotation of the motor, and proceeding to the next step;. Calculating, by the controller, whether the torque during the rotation of the motor is larger than the design moment range of the brake; if so, terminating the detection and restoring the elevator to normal running; and if not, controlling the elevator to enter a fault protection state and stopping the elevator from running; and characterized in that the method further comprises, a step of brake wear analysis: the torque during the rotation of the motor is recorded in the step during automatic detection at each time; the controller calculates a brake moment decline curve according to the torques of multiple detections, and if the slope of the curve is larger than a preset slope value and the torque during the rotation of the motor detected in the current automatic detection process is larger than the design moment range of the brake, the controller warns that the brake needs to be maintained in advance.. Initiating an automatic detection function to enter a step of elevator running state detection;. Determining, by the controller, whether the elevator is in an idle state; if not, performing the detection till the elevator enters the idle state; and if so, proceeding to the next step;. Controlling, by the controller, the frequency converter to continuously output stagewise-changing torque current to a motor while retaining a brake to be turned off; meanwhile, detecting, by the encoder, whether the motor rotates, and if so, feeding a signal back to the controller, recording the torque during the rotation of the motor, and proceeding to the next step;. Calculating, by the controller, whether the torque during the rotation of the motor is larger than the design moment range of the brake; if so, terminating the detection and restoring the elevator to normal running; and if not, controlling the elevator to enter a fault protection state and stopping the elevator from running; and characterized in that the method further comprises, a step of brake wear analysis: the torque during the rotation of the motor is recorded in the step during automatic detection at each time; the controller calculates a brake moment decline curve according to the torques of multiple detections, and if the slope of the curve is larger than a preset slope value and the torque during the rotation of the motor detected in the current automatic detection process is larger than the design moment range of the brake, the controller warns that the brake needs to be maintained in advance.