Blood sugar including fasting blood sugar and two hours after meal blood sugar, blood sugar 6.6mmol / L whether fasting blood sugar or two hours after meal blood sugar, are not considered diabetes, but fasting blood sugar 6.6mmol / L is high. The normal range of fasting blood glucose is 3.9~6.1mmol/L, two hours after meal blood glucose should be less than 7.8mmol/L; fasting blood glucose is greater than or equal to 7mmol/L, two hours after meal blood glucose is greater than or equal to 11.1mmol/L to reach the standard of diagnosis of diabetes. Therefore, both fasting blood glucose and two-hour postprandial blood glucose 6.6mmol/L have not reached the standard of diabetes. However, a fasting blood glucose of 6.6mmol/L may belong to the impaired fasting blood glucose, at this time, if you do not actively control the diet or with physical exercise may develop into type 2 diabetes mellitus. It is recommended to monitor the blood glucose regularly, and go to the hospital if the blood glucose value is abnormal.