Abstract: The present invention provides a method for on-line auction. According to the present invention including the steps of deciding whether there is an auction opened for a particular item, producing a new auction for the item if there is no auction opened for the item, withdrawing a present price inspection cash according to the request of a present price inspection by participants of the auction and decreasing the present price of the item by an amount of the withdrawn present price inspection cash, deciding a first bidder at the particular present price as a winner, determining the particular present price as a winning price, and closing the auction, and taking part in the new auction opened for other bidders after the first bidder's bidding and new participants.