Elderly seventy-year-old blood glucose is around 8.5 mmol/L. If it is fasting blood glucose, it is higher than the normal range; if it is 2-hour postprandial blood glucose, it is higher than the normal range, and further examination is needed to confirm it; if it is random blood glucose, it is within the normal range. Consultation with a doctor is recommended. Generally speaking, for seventy years old, the normal value of fasting blood glucose is still between 3.9-6.1mmol/L, and the blood glucose of 2 hours after meal is <7.8mmol/L. If the blood glucose is around 8.5mmol/L is fasting blood glucose, combined with whether the patient appears to eat a lot, drink a lot, urinate a lot as well as weight loss and other symptoms of diabetes to determine whether it is diabetes. If the blood glucose around 8.5mmol/L is a 2-hour postprandial blood glucose, it may belong to impaired glucose tolerance, which also needs to be combined with a fasting blood glucose test to determine. If the blood glucose around 8.5 mmol/L is a random blood glucose, it is within the normal range. In conclusion, if a seventy year old measures a blood glucose of 8.5 mmol/L, further investigations should be done if necessary and interventions should be carried out as prescribed by the doctor.