The blood glucose range value of diabetes, the diagnosis of diabetes mellitus is fasting greater than 7mmol / L, postprandial greater than 11.1mmol / L, at the same time the occurrence of these 2 points are high, the basic diagnosis of diabetes mellitus. If a patient has diabetes, it is recommended that younger patients, those under 40 years of age, have their blood glucose controlled in the normal range of 4.4-6.1 mmol/L fasting and 7.8 mmol/L postprandial. However, there are different standards for different patients. If a patient needs surgery, eye surgery, more delicate, it is recommended that the blood glucose last above the normal range. If the patient has diabetes for many years, age 65 or older, fasting control at 6-8mmol / L, after meals 8-10mmol / L are possible. Other patients if the cancer is advanced, life expectancy has been very short, fasting control in 8-10mmol / L, after meals to 15mmol / L can also be. If you are a pregnant woman, it is better to control the fasting below 5.1mmol/L, one hour after meal below 10mmol/L, and two hours after meal below 8.5mmol/L, but it is better to control the fasting below 5.1mmol/L, and after meal around 6.7mmol/L, which is better for the fetus.