Diabetes mellitus usually focuses on monitoring fasting and 2-hour postprandial blood glucose and glycosylated hemoglobin. The normal values of fasting blood glucose and 2-hour postprandial blood glucose in older adults with diabetes vary depending on the duration of the diabetes, concurrent diseases, organ function, and the individual’s ability to live. The current blood glucose control standards for elderly diabetic patients are as follows: 1. Elderly diabetic patients with new diagnosis, short disease duration, low risk of hypoglycemia, strong self-management ability, and good therapeutic conditions have the following glycemic control: glycated hemoglobin less than or equal to 7.0%, fasting blood glucose 4.4-7.0 mmol/L, and 2-hour postprandial blood glucose <10.0 mmol/L. 2. Elderly patients with hypoglycemic risk, moderate complications and concomitant diseases, and poor self-management ability, blood glucose control standard: glycated hemoglobin 7.0%-8.0%, fasting blood glucose 5.0-7.5 mmol/L, 2-hour postprandial blood glucose <11.1 mmol/L. 3. Elderly diabetic patients with life expectancy less than 5 years, history of severe hypoglycemia, accompanied by serious complications, and loss of self-management ability, glycemic control: glycated hemoglobin 8.0%-8.5%, fasting blood glucose 5.0 -8.5mmol/L, postprandial 2-hour blood glucose <13.9mmol/L. Glucose control standards for elderly diabetic patients should be determined under the guidance of endocrine specialists in regular hospitals. Poor glycemic control may lead to serious complications, so diabetes needs to be treated immediately upon diagnosis, with regular oral medication or insulin under the guidance of a doctor, and regular monitoring of blood glucose, so as not to delay the condition.