Once diagnosed with diabetes can not be cured at present, but the condition can be alleviated to a certain extent. For patients with type 1 diabetes, if early insulin treatment, the patient’s condition can be alleviated, some patients can control their blood glucose with a small amount of insulin, or stop using insulin, the blood glucose control is still good, known as the honeymoon period of diabetes, which lasts for a few months, and in some cases, can be up to one year, but the patient will still have elevated blood glucose after the end of the honeymoon period. Therefore, once a patient is diagnosed with diabetes mellitus, lifelong treatment and comprehensive treatment are needed, such as diet and exercise, choosing reasonable hypoglycemic drugs, and at the same time adjusting the hypoglycemic drugs according to the patient’s pancreatic islet function. For type 2 diabetes patients with early intervention, pancreatic islet function can be restored to a certain extent, the application of a small amount of drugs or only diet and exercise can control good blood glucose. Therefore, patients with diabetes must be treated at an early stage to improve pancreatic islet function and delay islet failure in order to better control blood glucose.