Elevator group management system and control method therefor

A system is provided for supporting a reduction in average waiting time of an elevator group management system, and an evaluation on group management control performance. A forecasted trajectory of each elevator within a predetermined time from a current time point is found and displayed. Also, an evaluation value is calculated for a forecasted interval with respect to a target interval between respective elevators in a predetermined time from the evaluation value, and an elevator is allocated to a generated hall call based on the evaluation value such that the forecasted interval comes closer to the target interval. By displaying the forecasted trajectory of each elevator, it is possible to support the evaluation on the performance of the group management system through clarification of the reason for allocation. Also, the control performance of the group management system is improved, including a reduction in average waiting time, through allocation control close to an ideal one.