The one-hour postprandial blood glucose value refers to the blood glucose measured one hour from the first bite of meal. There is no specific regulation on the one-hour postprandial blood glucose value for non-pregnancy, but we can refer to the standard of random blood glucose, that is, the one-hour postprandial blood glucose below 7.8 mmol/L is normal, and more than 11.1 mmol/L may exist diabetes. At present, the one-hour postprandial blood glucose value is not used as the basis for the diagnosis of diabetes, and the diagnostic standard of the World Health Organization on diabetes is still adopted, which still takes fasting blood glucose and two-hour postprandial blood glucose or two-hour oral glucose tolerance test as the standard. The one-hour postprandial glucose value can be used as a reference, mainly for the determination of pancreatic islet function, and the one-hour postprandial glucose value is lower than 10.0 mmol/L during pregnancy, and if the one-hour postprandial glucose value is greater than 10.0 mmol/L then gestational diabetes can be diagnosed.