Dietotherapy has some basic principles. First of all, the amount of food should be moderate, not partial to a certain food. It is best to harmonize the four flavors in food and so on. Secondly, implement diet therapy according to different constitutions. As a general food, of course most people can eat it. But as a diet therapy, it needs to be based on different constitutions. Some foods are more suitable for eating, while others are not. Inappropriate food, from the point of view of disease, is usually called taboo. For example, people with poor appetite are usually suitable for eating some fragrant and digestive foods, but not too sweet and greasy, as well as tea and wine.

Generally speaking, diet pays attention to color, fragrance, taste and food. Starting from the basic conditions of modern life, especially from the perspective of scientific health preservation, the word "Ping" should also be added, that is to say, the human body can achieve the relative balance of Yin, Yang, Qi and blood through dietotherapy. Therefore, the diet should pay attention to color, fragrance, taste, food and flatness.