Whether 2 hours postprandial blood glucose 8.5 mmol/L is normal or not is judged by different criteria depending on the population. For the general population, 2 hours postprandial blood glucose 8.5mmol/L is abnormal. For pregnant women and diabetic patients, 2 hours postprandial blood glucose 8.5mmol/L can be judged as normal. 1. General population: 2 hours postprandial blood glucose 8.5mmol/L is abnormal. Normal people’s 2-hour postprandial blood sugar should be ≤7.8mmol/L; 2-hour postprandial blood sugar at 7.8-11.1mmol/L belongs to abnormal glucose tolerance. The 2-hour postprandial blood sugar ≥11.1mmol/L can be diagnosed as diabetes; 2. Pregnant women: the normal range of 2-hour postprandial blood sugar value for pregnant women is ≤8.5mmol/L, if it is >8.5mmol/L, it can be diagnosed as gestational diabetes; 3. Diabetic patients: 2-hour postprandial blood sugar 8.5mmol/L indicates that the basic blood sugar control is up to standard. Diabetic patients should pay attention to diet, other treatments are all functioning on the basis of diet control, only when diet control reaches the standard, other treatments can be more meaningful; 4. Elderly diabetic patients: due to more complications and poor prognosis, the limitation of postprandial blood glucose should not be too strict, the patient’s postprandial 2-hour blood glucose 8.5mmol/L can be regarded as normal, and generally control within 10.0mmol/ L or less is acceptable.