Drinking a bottle of beer at dinner postprandial blood glucose three hours 6.3mmol / L, for normal people and diabetes is generally a normal level, it is recommended to monitor the fasting blood glucose and 2 hours after meals blood glucose. In general, 3 hours after the meal blood glucose level will return to the level of fasting blood glucose, that is, 3.9 ~ 6.1mmol / L. But 3 hours after the meal blood glucose is not as a diagnostic criterion for diabetes mellitus, more recognized as random blood glucose. The normal level of random blood sugar should be less than 11.1mmol/L. If the blood glucose level is abnormal, it is recommended that the patient go to the hospital for intravenous blood glucose testing, which will more accurately reflect the blood glucose situation, and consult with a professional doctor after getting the results of the report, and need to standardize the use of medication under the guidance of the doctor.