The invention provides an elevator door system parameter setting method and system, and a door machine driver. The elevator door system parameter setting method comprises the following steps of: sampling first useful work and output currents output by the door machine driver when an elevator door is opened by a first preset distance at a first constant speed; sampling second useful work output by the door machine driver when the elevator door is closed by a second preset distance at the first constant speed; sampling third useful work output by the door machine driver when the elevator door is closed by a third preset distance at a second constant speed; calculating the maximum closing speed of the elevator door, the closing blocking currents of a car door and the closing holding currents of the car door according to the first useful work, the second useful work, the third useful work and the output currents; and setting elevator door system parameters by using the maximum closing speed, the closing blocking currents of the car door and the closing holding currents of the car door. The elevator door system parameter setting method and system have the beneficial effects that the elevator door system parameters are obtained by self learning; the debugging process of the elevator door can be simplified; and the operation safety of the elevator and the door machine is improved.