An Internet broadcasting contents consignment sale system and method. An Internet broadcasting station makes a consignment sale contract with companies or individuals who have copyrights of authored pieces, such as computer and video game makers, filmmakers, music producers, television broadcasting stations, and publishers; generates the consigned authored pieces into specific contents data; allows users to use the contents data only through a specific execution program provided by the Internet broadcasting station; permits Internet users to download the contents via wire and wireless Internet free of charge and keep them; and allows the users to use desired contents data by receiving restoration information on the Internet.