The invention discloses a bidding and auction system. The system comprises a bidding demand obtaining module; a historical data acquisition module; a bidding information generation module, which is used for generating bidding information according to a bidding demand and historical data; a bidding competition information obtaining module, which is used for obtaining bidding competition information of a bidding competition side; a bidding wining information obtaining module, which is used for obtaining bidding wining information of a bidding side; a reservation scheme generation module, which is used for generating a reservation scheme according to the obtained bidding wining information and the bidding competition information; a reservation information obtaining module, which is used for obtaining reservation information corresponding to the bidding side; and a settlement module, which is used for carrying out settlement according to the generated reservation scheme and the received reservation information. The bidding and auction method and system can realize benefit maximization of the bidding side and the bidding competition side.