There is provided an information delivery device including a command transmission unit configured to accept a command request from a client and to transmit a command corresponding to the command request to a device, an information obtaining unit configured to obtain device information transmitted from the device as a response to the command, and an information storage unit configured to store the device information obtained by the information obtaining unit. The device may further include a judgment unit configured to judge which of current device information obtained by the information obtaining unit and past device information stored in the information storage unit should be provided for a requesting source, the current device information corresponding to device information presently set to the device, and an information providing unit configured to provide one of the current device information and the past device information for the requesting source in accordance with a judgment result of the judgment unit.