The invention provides an elevator target floor reservation system which prevents damage and fouling of a target floor login device in a project period, maintains convenience of project operating personnel and does not need to additionally provided with a group management control device used for virtual elevator calling buttons. In an elevator system including a plurality of elevators, a group management control device which manages running of the plurality of elevators and login devices arranged on target floors of landing, i.e., target floor login devices, the group management control devicehas a numbered elevator distribution unit which distributes a certain one of the plurality of elevators aiming at elevator calling from the target floor login devices and virtual elevator calling buttons, and under the circumstance that the group management control device is not connected with the target floor login devices and is connected with the virtual elevator calling buttons, the numberedelevator distribution unit distributes a certain one of the plurality of elevators aiming at input from the virtual elevator calling buttons.