Patent ID: 8160932

Claim:
An artwork-trading computer system comprising: a server which performs a primary auction and a secondary auction and sets respective bidding periods; an artist terminal which sends visual data relating to an artwork of the artist to the server; and a collector terminal which sends bidding data of the artwork to the server, wherein in the primary auction, the art work is put up from the artist terminal, the artwork is bidden from the collector terminal, the server sends the artist terminal a signal for requesting to select a winning bidder among bidding collectors, and a consideration for the artwork successfully bidden is given to the artist, and in the secondary auction, the art work is put up for resale from the collector terminal, the artwork is bidden from the other collector terminal, the server decides a winning bidder who offers a best bid price among bidding collectors, and a nonzero predetermined amount of a share of a resale price of the artwork successfully bidden is given to the artist every time the artwork is resold.