excessive supply and improper storage. Airlines will prepare a variety of dishes for each passenger, but in fact, passengers may not always choose or eat these dishes, which leads to the waste of aviation meals. On long-distance flights, aviation meals need to be placed in refrigeration equipment, and some airlines have problems in fault detection and maintenance of refrigeration equipment, which has a great impact on the preservation of meals. Aircraft meals are the meals provided to passengers by civil aviation aircraft during the voyage.