Diabetes is related to genetic factors, autoimmune, but also related to personal life and dietary habits, so it can be prevented, can be prevented by improving dietary habits and monitoring blood glucose. 1. Good dietary habits: first of all, we should eat a reasonable diet, ensure balanced nutrition, reasonable combination, eat small meals, control daily energy intake, avoid overeating; but also to increase physical activity, mainly aerobic exercise, such as swimming, yoga, jogging, etc., preferably more than 5 times a week, more than 30 minutes each time; obesity or overweight people should be reasonable to reduce weight. 2. Monitor blood glucose: For people at high risk of diabetes, such as those with a history of prediabetes, age ≥ 40 years, overweight or obesity, first-degree relatives of diabetes, history of gestational diabetes, polycystic ovary syndrome, and those who have received long-term antidepressant medication, they should monitor their blood glucose on a regular basis, including fasting and postprandial blood glucose. People should develop good lifestyle habits and those at high risk of diabetes should monitor their blood glucose regularly. Seek medical attention when abnormal blood glucose is detected.