In a network auction, bidder clients are enabled to recognize ongoing auction sessions substantially on real time. An information image which integrates as a single handling unit an image information pertaining to an auction exhibit item and a related information which guides to establish communication with a particular network auction server through operation of the operator in accordance with this image information is created, and down-linked to the bidder clients to speed up the auction procedure. Thereby, enabling the bidder client to access to a bidding home page on the auction site simply and easily, and to know the ongoing bidding competitive situation almost on real time by tracking the information image created.