The 2-hour postprandial blood glucose can be used as an indicator to monitor blood glucose control, regardless of whether it is more accurate in the morning, midday or evening. The 2-hour postprandial blood glucose is timed from the first bite of food to 2 hours later, which can reflect the reserve function of pancreatic β-cells of patients, and whether the amount of food and the dosage of hypoglycemic drugs are appropriate. It is recommended to monitor the blood glucose 2 hours after three meals in the morning, noon and evening to strengthen the blood glucose assessment, which can clarify the blood glucose control situation and facilitate the adjustment of medication. In general, it is recommended that the 2-hour postprandial blood glucose of diabetic patients should not exceed 10.0 mmol/L. If the blood glucose rises, it is recommended to adjust the medication under the guidance of the doctor.