With the progress of the times and the development of science and technology, Internet of things technology has been gradually applied in many business fields and urban construction in China. The development and maturity of Internet of things technology based on big data has further promoted the development of urban construction in China and made people's life more convenient. With the gradual improvement of people's living standards, food safety has become the focus of people's concern. The research on the application of Internet of things technology can promote the application of Internet of things technology in work and life to be more scientific and extensive. This paper introduces the current situation of food traceability and the application of Internet of things technology in food safety management under the background of big data, and makes relevant analysis and discussion, in order to improve food safety problems in the future and provide a reference for relevant researchers. In addition, this paper also discusses the application of Internet of things technology in logistics management, geological exploration, medical informatization, environmental security and smart city construction, and looks forward to the conclusion, hoping to provide a reference and ideas for the application and development of Internet of things technology.