Food therapy health method is referred to as "food nutrition". That is, the use of food to influence the body's functions in all aspects, so that it is healthy or to heal and prevent disease a method of health care. In common parlance, it is also through eating to maintain our body. It is generally recognized that food is an edible substance that provides the body with various nutrients necessary for growth, development and healthy survival. That is to say, food is mainly for nutritional purpose. In fact, Chinese medicine has long recognized that food is not only nutritious, but also can cure diseases. Such as the modern medical practitioner Zhang Xichun in the "medicine in the reference to the Western Record" has pointed out that: food "the patient served, not only healing, and can be hungry; not only hungry, more can be suitable for the mouth, with the symptomatic, the disease from the gradual healing, that is, the symptomatic, there is no other problem". With the development of society, people pay more and more attention to the way of health. A lot of food suitable for health has been promoted, common health grain powder, grain porridge, medicinal meals and so on.