Three-hour postprandial blood glucose should normally return to the fasting blood glucose level, but three-hour postprandial blood glucose is not fasting blood glucose, belongs to the random blood glucose, so three-hour postprandial blood glucose 6.0mmol/L is normal. It is recommended that intravenous fasting blood glucose and two-hour postprandial blood glucose measurements be performed under the guidance of a physician to clarify the presence of elevated blood glucose. The normal range of fasting blood glucose is 3.9~6.1mmol/L, two-hour postprandial blood glucose should be less than 7.8mmol/L, and random blood glucose should be less than 11.1mmol/L. The three-hour postprandial blood glucose is mostly recognized as random blood glucose, therefore, the three-hour postprandial blood glucose of 6.0mmol/L is in the normal range. If the blood sugar is abnormal, it is recommended to consult the endocrinology department of the regular hospital, make a clear diagnosis and standardize the treatment under the guidance of the doctor.