2 hours postprandial blood glucose refers to the blood glucose measured from the first meal to 2 hours later. Its normal value varies according to different age groups. According to the latest 202 1 blood glucose evaluation standard, the normal range of fasting blood glucose in adolescents should be 4.4 ~ 6. 1mol/L, the postprandial blood glucose should be lower than 8.0 mol/L, the fasting blood glucose in middle-aged people should be between 6. 1 ~ 7.0 mmol/L, and the postprandial blood glucose should be between 8.0 ~/kloc. The fasting blood glucose level of the elderly should be maintained at 7.0-9.0 mmol/L, and the postprandial blood glucose should be between 8.0-11.0 mmol/L. If the normal blood glucose level 2 hours after meals detected in the hospital is higher than the standard value, there are still symptoms related to diabetes, such as dry mouth, excessive drinking water, excessive urination, overeating, weight loss, etc., which can be diagnosed. In order to prevent diabetes, we must pay attention to the daily blood sugar test. If possible, we can configure a Sannuo blood glucose meter at home for daily blood glucose monitoring.