Diabetes is not an incurable disease, although it cannot be cured, but with reasonable treatment, including reasonable diet, exercise and medication, usually pay attention to blood glucose monitoring, learn to self-management, so that blood glucose control in the normal range, diabetic patients can live a long and healthy life. Diabetic diet therapy is one of the basic treatments for diabetes, but some diabetic patients treat diet therapy as a one-sided and simple starvation therapy, which is a misunderstanding. The so-called diabetic diet therapy is not only to control the diet but also to have a reasonable diet. The core is to pay attention to the quality and quantity of the diet. The quantity is the total calories of the diet, and the quality is the structure of the diet.