There is a widespread phenomenon of food waste in university canteens. According to the survey, the main reasons for the waste are: too much staple food, not knowing the taste leads to stepping on thunder, and the variety of dishes is single. On the "Easy Meal" platform, users can view the dish information before eating and choose the appropriate portion size. In addition, the user's meal evaluation and feedback data will be presented to the canteen operator in the form of visual data, in order to improve the canteen operation, reduce food waste and maximize the canteen income...