In an elevator system which performs group control of plural elevators, a hall call registration device allows a user to perform registration of a hall call before arriving at an elevator hall, and an assigned car is determined for a remote hall call registered from this hall call registration device. When a remote hall call is registered, measurement of a first time is started, and in the period from the stop of the assigned car at the hall to an elapse of the first time, a door close button of the assigned car is made ineffective. After that, when the first time has elapsed, the door close button is made effective. The assigned car is caused to wait with its door open at the hall until the second time elapses after arrival of the assigned car at the hall or an elapse of the first time, whichever is later.