To provide an elevator group supervisory operation and control device devised capable of restraining probability to cause failure in the middle of operation without lowering a utilization factor at the time of detecting a sign of the failure of a group supervisory operation elevator.

A group supervisory operation device 3 judges whether other normal elevators are in the middle of operation or not when the sign is detected by elevator abnormality disgnosis devices 1a, 1b, 1c, makes the elevators detecting the sign assignable elevators in the case when the normal elevators are all in the middle of operation and carries out assignment treatment from the other elevators by excluding the elevators detecting the sign from the assignable elevators.