The system is mainly used on live auction/bidding events. It is installed in a computer and the interface can be projected to a projector. The bidder can view current price, lot number, equivalent foreign currency, final hammer price and item image. When the auction is carried out, the computer operator can increase the step price by a key or input the price as needed. Once the auction is completed, all the related information can be exported to account system. It can save time on after sales processing.