This storage system has a first disk array device for providing a first volume that stores data transmitted from a host system, a second disk array device for providing a second volume that is virtualized with the first disk array device, and a management terminal for managing the first disk array device; wherein the first disk array device includes a first management unit for managing volume information of the virtualized volume that was virtualized in the first disk array device by being mapped with the second volume; and a first transmission unit for transmitting, based on an external operation, the volume information of the virtualized volume managed with the first management unit to the management terminal; and wherein the management terminal includes a second management unit for managing the volume information of the virtualized volume transmitted from the first transmission unit.