The four gases of food is usually said to be the cold, hot, warm and cool food, and a flat, because there is no obvious hot, cold, so there is no separate as a gas. The food is different gas is hot, cold, warm and cool, the curative effect is also different, in the choice of food, according to the nature of the disease and the patient’s physique to choose the right food, so as to play a role in health care or cure. 1, cool and cold food, has the effect of clearing heat, detoxification, diarrhea, this kind of food is suitable for Yang evidence, heat evidence, such as red eyes, dry mouth, constipation, hot hands and feet, such as heat evidence. The common such foods are bitter melon, pumpkin, winter melon, radish, mung beans. 2, warm and hot foods have the effect of warming Yang and dispersing cold, such foods are commonly used in cold, Yin evidence, such patients generally manifest fatigue, fear of cold, urine clear and long, loose stools, commonly used foods are ginger, onion, garlic, mutton, beef, dog meat. 3, flat foods, flat foods are mostly nutritional health products, regardless of the heat, cold evidence It can be used with all, especially for the deficient patient is a very good choice. In fact, many of these foods are used as staple foods, such as rice, glutinous rice, yam, peanuts, etc., are all neutral foods.