Diet is a book about diet and nutrition. During the Zhou Dynasty in China, there was a "food doctor" in the government who was in charge of medical problems related to diet. In later dynasties, there were materials and books about using diet as a treatment method, which was called "dietotherapy". However, from the standpoint of healthy people, the book that pays attention to diet and nutrition and nourishes the body in order to achieve the purpose of strengthening the body should be the earliest. Although this book is called Diet, its contents include medical care, recipes of famous doctors in past dynasties, and various meat and milk foods with Mongolian dietary characteristics. Even the Compendium of Materia Medica written by Li Shizhen, a famous doctor in the Ming Dynasty, quoted the relevant contents in the book. Therefore, Diet is of great significance to the study of traditional Chinese medicine and the history of Mongolian medicine science and technology. Eat and Drink is divided into three volumes. The first book is about health taboos, pregnancy taboos, wet nurses taboos, drinking taboos, and treasure. Volume two talks about raw materials, drinks and dietotherapy, including all kinds of decoction, fairy bait, deviation of four seasons and five flavors, dietotherapy, food injury, food aversion, food poisoning, etc. The third volume talks about food, vegetables, all kinds of meat and fruits. At that time, eating and drinking was the monograph of the emperor to prolong life, but it also played a great role in the people. As the preface of the book says: "How to study in the palace, the precepts of ancestors' hygiene, and knowing Chen Yi's diligence will help to show his sincerity, promote his benevolence and spread widely." Because of this, Gai should promote a person's safety, make everyone feel safe, promote a person's life and make everyone live a long life. The thickness of grace is not added here. Most of the books were left by ministers in the golden world.