There is a good positive correlation between glycosylated hemoglobin and blood glucose, and both are important indicators for blood glucose testing. Blood glucose, on the other hand, includes fasting, postprandial, and random blood glucose. 1. Glycated hemoglobin is the gold standard of glycemic control, and is mainly used to measure whether the treatment regimen of the past 2-3 months is appropriate and needs to be adjusted. It is generally recommended that diabetic patients keep their glycated hemoglobin within 7%. 2. Blood glucose is to understand the fluctuation of blood glucose by analyzing the fasting, postprandial and random blood glucose, and generally decide the treatment plan by monitoring the blood glucose situation, it is generally recommended that diabetic patients’ fasting blood glucose is controlled at 4.4-7.0mmol/l, and non-fasting blood glucose is controlled at 10mmol/l or less; 3. Glycated hemoglobin blood sampling is not affected by fasting, full meal, exercise, hunger status, etc., and the test results are relatively stable. Blood glucose value is not the same every time the result is measured. It is divided into fasting, preprandial, postprandial and random blood glucose, which is affected by diet, emotion, environment and other factors…. The results of glycated hemoglobin and blood glucose should be analyzed specifically under the guidance of a doctor to formulate a reasonable treatment plan to benefit diabetic patients.