To perform auction taking in an intention of an exhibitor to allow active participation of all participants.

This auction system responding to a request from a user terminal connected via a communication network to execute auction processing has: an exhibition information input means inputting exhibition information including evaluation condition data set by the exhibitor; a bid information input means inputting bid information including a bid price and an answer to an evaluation item exhibited on the basis of evaluation conditions; a buying and selling condition calculation means determining a successful bidder on the basis of the bid information and the exhibition information; and a bid situation provision means correcting comparing data of each bidder by point allotment information of the answer of the bidder of a bid situation provision destination to calculate the bid price, and transmitting a calculation result thereof to the terminal of the bidder as the bid price of each the bidder.