For people who have not been diagnosed with diabetes, a fasting blood glucose of 6.1 mmol/L is not normal, which belongs to the level of impaired fasting blood glucose but does not reach the level of diabetes; however, it is normal for patients who have been diagnosed with diabetes, which belongs to the glycemic control to meet the standard. Elevated blood glucose is the main basis for the diagnosis of diabetes mellitus and the main indicator of diabetes mellitus condition and control. Fasting blood glucose (FPG) refers to blood glucose measured in venous blood without any caloric intake for at least 8 hours prior to the test. Fasting blood glucose ≤6.0mmol/L is normal blood glucose, 6.1-6.9mmol/L is impaired fasting blood glucose (pre-diabetes), and more than 7.0mmol/L accompanied by “three more and one less” symptoms can be diagnosed as diabetes. So fasting blood sugar 6.1mmol / L is not normal, should be timely intervention to avoid the development of diabetes. For diabetic patients, the goal of glycemic control is generally in the fasting blood glucose 4.4mmol / L ~ 7.0mmol / L, so the fasting blood glucose 6.1mmol / L usually belongs to the glycemic control of the standard, but also according to the individual situation of the development of glycemic control goals. It should be noted that the diagnosis can not rely on a single test indicator, but also need to be based on the patient’s medical history, symptoms, physical examination, as well as other auxiliary examination for comprehensive judgment.