Western medicine nutrition attaches great importance to and emphasizes the acidity and alkalinity of food, not by taste, but by whether the final metabolites in the body are acidic or alkaline after the metabolic transformation of food intake into the human body. It is believed that most animal foods such as fish, meat, poultry, eggs and seafood are acidic after metabolism in the body; most vegetable, fruits, beans and other plant foods are alkaline after metabolism in the body; and edible oil, salt, sugar, vinegar, wine and tea do not produce acidity and alkalinity after metabolism in the body, so they are neutral foods. Modern medical research shows that the human blood PH value is weakly alkaline (PH value 7.35~7.45), so it is recommended that humans should eat more alkaline food, which can help improve the acidic body of modern people. Studies have also shown that eating more alkaline food is beneficial to health, and that a high alkaline level can increase IQ, enhance immune function and improve resistance to disease. This view has some truth, but it is not comprehensive. Patients with acid reflux, such as those with stomach ulcers, should not eat more plant fruits with alkaline metabolism and acidic taste. Chinese medicine believes that food has the same four qi and five tastes as drugs, the four qi is the cold, hot, warm and cool food, that is, the yin and yang properties of Chinese medicine, that cold food is yin, warm food is yang. Most dynamic foods (such as birds and animals) are considered to be yang, and most static foods are yin. But not cold and not hot grains and cereals (such as grain, wheat, chestnut, beans, potatoes, etc.) is neutral, especially suitable for the balance of yin and yang of the human body, is the best basic food for human beings. But Chinese medicine and everywhere divided into yin and yang, yang food can also be subdivided into yang in the yang, yang in the yin, and calm and yang food; yin food can also be subdivided into yin in the yang, yin in the yin, and calm and yin food. (See the table below) Chinese medicine food therapy also believes that food has five flavors, namely, pungent, sweet, sour, bitter, salty, that pungent into the lungs, sweet into the spleen, sour into the liver, bitter into the heart, alkaline into the kidneys, eating a variety of different flavors of food, can be correspondingly nourishing and nourishing the corresponding five organs. Chinese medicine believes that the balance of yin and yang in the human body is healthy, while the yin and yang are in balance is sub-health and disease. The imbalance of yin and yang in the human body can be changed and corrected through the cold and hot yin and yang properties of food and medicine, thus achieving health and healing. TCM food therapy advocates the selection of food according to the body’s constitution, i.e., “food for the body”. For example, for those who have a yang deficiency and are afraid of cold, it is appropriate to eat yang (warm) foods, including yang in yang and yang in yin; for those who have a yin deficiency and are afraid of heat, it is appropriate to eat yin (cold) foods, including yin in yang and yin in yin. Neutral foods are suitable for all types of people and do not increase bias, so they are the basic food for human beings. It is the base of the pyramid of healthy diet and has the largest and most important proportion. Western medicine evaluates the nutrition of food by the amount of protein content as the standard, focusing more on the “quantity” and the acidity and alkalinity of food metabolism in the body; while Chinese medicine food therapy pays more attention to the cold and heat properties of food, yin and yang, the impact on the human body’s yin and yang, is a kind of overall concept of heaven and man corresponding, it pays more attention to the “quality” of food “It emphasizes the yin and yang properties of food, which should be combined with the yin and yang constitution of people, which is more comprehensive and scientific. Western medicine nutrition and Chinese medicine food therapy have their own advantages and shortcomings, the combination of the two is more conducive to health.