Electronic bidding system

The utility model relates to an electronic bidding system, which comprises a bidding card; the information recording device comprises a first mounting plate, an operation plate which is fixedly arranged on one side surface of the first mounting plate and is horizontally arranged, and a host arranged on the upper side of the operation plate; the protective cover is arranged on the outer side of thehost in a covering mode and fixed to the operation panel through a connecting piece, and a plurality of heat dissipation holes are formed in the side wall of the protective cover; the heat dissipation device is arranged at the heat dissipation position of the host and fixedly arranged on the inner side wall of the protective cover, and the heat dissipation device comprises a heat dissipation fanfixedly arranged on the side wall of the protective cover through a damping connecting piece and a dustproof grid mesh arranged at the position of an air outlet of the heat dissipation fan in a covering mode. Through the prote