The goal of diabetes treatment is to prevent acute and chronic complications of diabetes, such as ketoacidosis, cardiovascular disease, renal failure and diabetic foot, by applying various means, including rational diet, exercise, diabetes education, blood glucose monitoring and medication to achieve the blood glucose standard. The treatment plan for diabetic patients should be formulated according to the length of the disease, the status of pancreatic islet function, body type, the presence of comorbidities and complications, and the standard of blood glucose control differs according to individual conditions. The process of blood glucose attainment should be smooth, avoiding blood glucose fluctuation and preventing hypoglycemia as much as possible.