PURPOSE : A system for offering real estate auction information using the Internet is provided to enable a general user to obtain high accuracy and professional auction real estate information in the online without collecting the auction real estate information through a direct visit.CONSTITUTION : More than one member shop server is linked with a courthouse server, collects offline subsidiary data related to auction real estate of a corresponding area among basic data of the auction real estate offered from a courthouse, and registers the collected data to the online. A web server is linked with each member shop and courthouse server, includes an auction real estate management database, a subsidiary data management database, and a member management database. A user terminal inquires the auction real estate information and the subsidiary data registered to the web server by connecting to the web server through a member authentication procedure. A banking server pays a charge for the member authentication procedure.? KIPO 2006