Fasting blood glucose is generally recommended to be controlled at 4.4~7.0mmol/L for diabetic patients, and non-fasting blood glucose is less than 10.0mmol/L. Diabetes mellitus is a group of disorders of carbohydrate, protein and fat metabolism caused by absolute or relative insufficiency of insulin secretion and impaired utilization of insulin. In general, patients with diabetes need to control fasting blood glucose 4.4~7.0mmol/L, non-fasting blood glucose less than 10.0mmol/L, is a reasonable range. Patients with diabetes need to follow the doctor’s instructions to take medication, such as metformin, acarbose, gliclazide and other drugs, most patients can control blood glucose and improve the prognosis after drug treatment. Diabetic patients should set individualized blood glucose goals under the guidance of their doctors.