Abstract: An electronic catalog aggregation apparatus is provided between catalog provider devices and catalog user devices in an electronic catalog system, where the electronic catalog aggregation apparatus processes electronic catalog data received from registered catalog providers through networks into a prescribed common format and stores them in an electronic catalog database, extracts at least one of the electronic catalog data corresponding to a catalog request received from each registered catalog user, from the electronic catalog database, converts each extracted electronic catalog data into an electronic catalog in a format specified by the catalog request, and delivers the extracted and converted electronic catalogs to respective registered catalog users through networks.

Abstract: An electronic bidding proxy system capable of selecting an optimal maker or supplier quickly and efficiently even with respect to the bidding targets of a large amount of items is provided. The electronic catalog platform selects supplier candidate according to total points of each supplier calculated by applying a value of each bidding parameter described in a bidding catalog corresponding to a catalog for bidding produced from a bidding target information to a calculation formula or a template for supplier selection, produces their catalog for comparison, calculates total points of each supplier candidate according to a supplier candidate narrowing down information from a buyer's device and the template, selects a re-bidding supplier candidates, and selects an optimal supplier by regarding a re-bidding catalog corresponding to a catalog for re-bidding produced by integrating and processing their bidding catalogs and repeatedly carrying out the above described processing.