Abstract: An open self-service sales system based on positioning of customers includes an open partitioned weight-sensing rack including multiple storage subareas. The open self-service sales system further includes a positioning module and an automatic weighing unit which are connected to the central control module. The position information of the customer is bound with the subareas to accurately identify customers and the purchasing behaviors. The data flow is simple and reliable, and a large number of computing is avoided, which is suitable for large customer flows.