A three-hour postprandial blood glucose of 7.6mmol/l usually falls into the high range. Normal three-hour postprandial blood glucose is close to fasting blood glucose, normal fasting blood glucose is 3.9~6.1mmol/l, and three-hour postprandial blood glucose 7.6mmol/l, obviously greater than 6.1mmol/l, not normal, high blood glucose. The examination found that the three-hour postprandial blood glucose 7.6mmol/l, it is recommended to improve the fasting blood glucose and glucose tolerance test examination, to exclude whether there is diabetes mellitus. If the fasting blood glucose is greater than or equal to 7.0mmol/l, or glucose tolerance test is greater than or equal to 11.1mmol/l, or random blood glucose is greater than or equal to 11.1mmol/l, and there are the typical symptoms of diabetes, polyuria, polydipsia, polyphagia, and weight loss, then it can be diagnosed as diabetes. Diagnosis of diabetes must go to a regular hospital, if diagnosed with diabetes to follow the doctor’s prescription medication.