A device management system for a plurality of devices, including a data collecting device that acquires device data for one or more of the plurality of devices, and a transmission circuit that transmits the device data to a device management, wherein the device management station determines any outlying devices within the plurality of devices. Moreover, a device management method for a plurality of devices that includes acquiring device data for one or more of the plurality of devices, transmitting the device data to a device management station, generating a control chart on the basis of the transmitted device data, determining whether at least one of the plurality of devices is outside at least on of the upper limit and the lower limit, and providing an appropriate action to take on the basis of the determination.