Diabetes can be checked through the following ways, such as blood glucose, glucose tolerance test, glycated hemoglobin, pancreatic islet function and urine routine examination. 1. Blood glucose: blood glucose is the most intuitive to determine whether the diabetes control index is up to the standard, as well as a diagnosis of diabetes an indicator, blood glucose is divided into fasting blood glucose and 2 hours after meals blood sugar. 2. Glucose tolerance test: 8 hours before the test can not take in any calories, will be 75g glucose dissolved in 250-300ml of water, within 5 minutes to drink, respectively, measured in the pre-take, 30 minutes after taking, 1 hour, 2 hours, and 3 hours of intravenous blood sugar. 3. Glycated hemoglobin: Glycated hemoglobin represents the average level of blood glucose in the last three months, which is also checked by blood sampling. 4. Pancreatic Islet Function: Includes insulin and C-peptide tests, which are used to determine the state of pancreatic islet function. 5. Urine routine: mainly used to determine the level of urine sugar, or whether there is urine ketone body. If the patient needs to clarify whether there is diabetes, it is recommended to consult the doctor in time and conduct the examination under the doctor’s instructions.