The WeChat public platform is a Web App that is developed based on the developer mode. It can realize the interaction between the public number developers and individual users. This paper uses the message request & response interface provided in the developer mode to embed business information such as product information, popular products, cultural promotion, and product sales into the WeChat application. This paper successfully tested the public number's provision of location information, message reply and merchandise ordering functions on the mobile phone side. It has also been used by relevant commercial enterprises to solve the problem of the development of commercial enterprise marketing on mobile terminals.