A context information collection and distribution system registers read identification information in a computer device that manages and controls an RFID tag reading device and is located in a lowest hierarchy in wide area network topology. The computer device located in the lowest hierarchy in the wide area network topology notifies a computer device located in a higher management domain hierarchy that the computer device located in the lowest hierarchy manages read identification information of a target. Further, the computer device located in the management domain hierarchy notifies a computer device located in much higher ID system hierarchy that the computer device located in the hierarchy just under the management domain hierarchy manages the read identification information of the target.