the present invention relates to a technique for an elevator car to perform an emergency operation during a power failure , and in particular to a method for controlling a rescue operation of an elevator car which can rescue passengers by performing an emergency operation with an electromotive force of a permanent magnet - type synchronous motor during the power failure , in an elevator system employing the synchronous motor as a lifting motor . the method for controlling the rescue operation of the elevator car includes : a step for obtaining the electromotive force by rotating the synchronous motor due to the weight difference between the balance weight and the car during the power failure ; a step for charging the electromotive force in the condenser ; and a step for gradually increasing a rotation speed of the synchronous motor from a starting time thereof to a predetermined time for speed controlling matched with a charging voltage of the condenser at an initial stage of the power failure .