Diabetes is a group of metabolic diseases characterized by high blood sugar. Hyperglycemia is due to insulin secretion defects or their biological effects of damage, or both caused. Hyperglycemia in long-term diabetes, leading to various tissues, especially the eyes, kidneys, heart, blood vessels, nerve chronic damage, dysfunction. The etiology of diabetes is roughly one is Genetic factors. Type 1 or type 2 diabetes had significant genetic heterogeneity. There is a family history of diabetes mellitus, 1/4 ~ 1/2 patients with family history of diabetes. Clinically at least 60 kinds of genetic syndromes may be associated with diabetes. Second, Environmental factors, eating too much, reduce physical activity caused by obesity is the most important environmental factors of type 2 diabetes, so that type 2 diabetes genetic susceptibility to individuals prone to disease. There is no cure for diabetes, but through a variety of treatment can control diabetes. Mainly includes five aspects: diabetes education, self-monitoring of blood sugar, diet therapy, exercise therapy and drug treatment. Antidiabetic drugs are needed in the patient after eating and exercise therapy and diabetes health education, blood sugar control can not be achieved when the target treatment. Most antidiabetic drugs have a greater side effect, so the patient must follow the doctor's instructions. With the succession of new antidiabetic drug patents,the patient is not only actually reducing the cost of treatment, but also increased the number of treatment options, Take greater hopes to patients with disease control.