Normal people’s blood glucose can reach the peak 0.5-1h after meal, but the peak ≤11.1mmol/L. Normal people’s blood glucose has a certain pattern before and after meal, fasting blood glucose is generally 3.9-6.1mmol/L, oral glucose 0.5-1h blood glucose can reach the peak, the peak ≤11.1mmol/L, 2h blood glucose ≤7.8mmol/L, 3 hours blood glucose can return to Fasting level, and urine glucose at each testing time point was negative. Fasting blood glucose ≥7.0mmol/L or 2h postprandial blood glucose ≥11.1mmol/L can be diagnosed as diabetes. Impaired fasting glucose was diagnosed when fasting glucose was 6.1-7.0 mmol/L and normal 2-hour postprandial glucose, and impaired glucose tolerance was diagnosed when 2-hour postprandial glucose was 7.8-11.1 mmol/L and normal fasting glucose. Therefore, blood glucose ≥11.1mmol/L at any moment needs to be noticed, and further detailed examination at the endocrinology department of the hospital is needed, and reasonable treatment is carried out to control blood glucose.