1, low temperature storage method. Low temperature storage is a common method to store cooked food. Its main principle is to effectively inhibit the growth and reproduction of microorganisms, reduce the activity of enzymes, weaken the chemical reaction in food, and better maintain the original flavor and nutritional value of food.

2. High temperature storage method. High temperature storage is a common method of food storage in catering industry. Because microorganisms have weak tolerance to high temperature, they can effectively kill microorganisms and destroy the activity of enzymes when the temperature rises, which can prevent the influence of microorganisms on food and achieve the purpose of storing food.

3. Ventilation storage method. Ventilation storage method is mainly suitable for preserving grain, dry grain and food that needs air drying. Their characteristic is that they are afraid of mildew and covering.

4, pickling, pickling, sauce, bubble storage method. This method is generally to add salt, sugar, vinegar, sauce and spiced food in a certain proportion to make the food absorb to a certain concentration. Inhibit the growth of microorganisms and achieve the purpose of long-term preservation of food. For example, pickled products include salted radish strips, salted beans, sweet and sour garlic and so on. Pickled products include spiced kohlrabi, pickled cucumber and pickled cabbage. Pickled products include pickled cabbage, pickled pepper and pickled eggplant.

5. Smoked storage method. Fumigation is a method of smoking and baking food with smoke produced by incomplete combustion of sawn leaves, loose branches and other substances. Smoked food not only reduces the moisture inside the food, but also has the function of sterilization and preservation, and wood tar and creosote oil adhere to the surface of the food, which can prevent the growth of bacteria and thus achieve the function of antiseptic storage. The common smoked products are smoked fish, smoked chicken and bacon.

6, vacuum sealing preservation method. Vacuum sealing preservation method is a method to keep food in a vacuum state without contact with microorganisms in the air, such as canned products and vacuum packaging products. This method is suitable for the preservation of various foods.