Abstract: Commodity selection systems and methods are provided. The system includes a storage unit and a processing unit. The storage unit stores sales data corresponding to a plurality of sales commodities, and at least one attribute for each of a plurality of commodities, wherein the commodities include the sales commodities of the commodity sales machine, and a plurality of candidate commodities. The processing unit determines indication data for the respective sales commodity according to the sales data of the respective sales commodities, and uses a classification algorithm to set up a machine sales model according to the attributes and the indication data corresponding to the sales commodities. The processing unit applies each of the candidate commodities to the machine sales model, thus to obtain the indication data for the corresponding candidate commodity.