The storage temperature of the fresh-keeping warehouse is generally 0°C~5°C, which is mainly used for fresh-keeping, that is, to maintain the original quality and freshness of agricultural products to the greatest extent for a long period of time, and the main body of agricultural products should not die as much as possible. In a dormant state, it reduces the loss of nutrients and maintains a fresh quality. This is generally applied to the category of fruits and vegetables. The current fruit and vegetable industry is all concentrated cultivation. In the process of transportation and sales, it is inevitable to use cold storage to maintain the nutrients that fruits and vegetables should have.