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In view of the problems of traditional supermarket shopping in shopping guidance, slow settlement and poor user experience, an intelligent self-service shopping system based on Internet of things is proposed in this paper.The system mainly uses RFID technology, wireless network communication technology, WeChat small program and dynamic website development technology to realize. RFID installed in shopping cart can obtain product label information and interact with remote cloud server through wireless communication. Shoppers can get the shopping guide information and detailed shopping list of goods in the shopping cart in real time through the WeChat small program of mobile terminal, and they can get quick settlement through electronic payment without queuing. Merchants can conduct commodity management and release promotional activities through the backstage management website. The system not only improves the shopping efficiency of customers and increases the fun of shopping, but also makes the business management more convenient and efficient.