The invention provides an automatic sales system. The automatic sales system comprises a client, which is used to purchase goods by a payment code of a payment platform; a sales terminal, which is used to sell the goods, manage the goods, and scan the payment code of the client; a management server, which is used to process the orders of the goods, control the output of the sales terminal, and count a sales condition; the payment platform, which is used to provide and check the payment code. The automatic sales system is advantageous in that during shopping, a good and convenient shopping channel is provided for consumers, and the consumers use the payment code of the payment platform, and the goods are output after the payment code being scanned by the sales terminal, and then a process of making changes carried out by salesclerks and conventional sales machines during shopping at shops is saved, and a touch screen is used to display the goods visually, and in addition, the consumers are not required to find the goods in the shops, and therefore operation is simple, and payment is convenient; for the merchants, operation costs and labor costs are reduced, and pressure of counting small money is saved.