Abstract: Explored the research progress of refrigerator preservation technology, including three categories of methods: physical preservation, chemical preservation, and biological preservation. This article introduces traditional refrigerator preservation techniques, including the advantages and disadvantages of direct cooling and air-cooled refrigerators, as well as preservation techniques based on precise temperature control, partitioned storage, and gas control. In terms of new refrigerator preservation technology, cutting-edge technologies such as electric and magnetic field preservation technology, light preservation technology, and plasma preservation technology have been widely applied. Propose that the intelligentization of refrigerators should focus on food preservation, optimize human-machine interaction experience with Internet of Things technology, and provide scientific storage suggestions. The future refrigerator preservation technology will develop towards diversification and intelligence to meet consumers' demand for high-quality and safe food.

Key words: Refrigerator, Food preservation, Food safety