In an electronic bidding method used by a bidder to bid for a bid item supplied on a network, a virtual server is generated for each newly supplied bid item when a supplier makes an entry of the bid item for a bidding. The virtual server is secured until a bidding due date of the supplied bid item. Bidding forms transmitted from bidders for the bid item can be received via the virtual server until the bidding due date, and can be managed by the virtual server.