The normal value of 2-hour postprandial blood glucose should be less than 7.8mmol/L for 70-year-olds, and 2-hour postprandial blood glucose should be less than 10.0mmol/L for elderly diabetic patients, and the glycemic target can be appropriately relaxed according to their own situation. Clinically, the normal range of fasting blood glucose is 3.9-6.0mmol/L, and the normal 2-hour postprandial blood glucose is less than 7.8mmol/L. For 70-year-old patients with diabetes, the glycemic control goal is generally in the fasting blood glucose 4.4 mmol/L to 7.0 mmol/L, and non-fasting blood glucose does not exceed 10.0 mmol/L. The glycemic control goal should be relaxed appropriately because elderly diabetic patients are at high risk of hypoglycemia and have poorer ability to perceive hypoglycemia, which is not easy to detect when it occurs. If there is a tendency to hypoglycemia, poorer self-management ability, more serious complications, etc., the glycemic control target can be appropriately relaxed according to their own situation to prevent hypoglycemic reactions. If any abnormality occurs during blood glucose monitoring, it is recommended to consult a doctor in time for treatment under the doctor’s guidance.