According to the present invention, in the operation of a mini bar of a hotel, the additional communication service provider installs a mini bar that can be managed by contracts with a plurality of hotels and a mini bar management means designated at a computer address in each hotel, and each hotel contracted to the Internet area. Manage the room's mini bar usage and food and beverage expiration date in real-time ON-LINE for each address of the mini bar, and supplement the products where the mini bar's sales were made with OFF-LINE, and replace the products with the expiration date. The present invention provides a method and model of a supplementary communication business for a hotel mini bar, wherein the mini bar sales are distributed at a predetermined rate with the hotel.
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