A destination table is updated on the basis of the use record of destination information in adaptation to the environment of a user. A device management server collects a destination table managed by each device from a device on a network. Then, the device management server checks the use record of the destination table collected from each image forming device, and determines a candidate to be deleted. Then, the device management server does not delete the destination table determined to be a deletion candidate when a number of times operations have been performed by the image forming device in a predetermined period is less than a threshold value. The device management server deletes the destination table of the determined candidate when the number of times operations have been performed by the image forming device in the predetermined period is greater than or equal to the threshold value.