The majority of obese type 2 diabetic patients can get stable and ideal glucose control effect through this surgery, so that patients can no longer rely on glucose-lowering drugs, which can be regarded as a “cure” for diabetes in a way. However, weight loss metabolic surgery only allows the residual pancreatic organs to regulate blood glucose in various ways, and does not repair the function of the pancreas, nor is it a real cure for diabetes. In other words, if the patient’s life and eating habits are still bad after the surgery, it will still lead to the increase of blood sugar. Bariatric surgery is only an auxiliary tool to help patients control their diet and reduce insulin resistance, but it cannot control their behavior. If the patient does not follow the instructions of the health manager or doctor after the surgery, and always eats high-calorie, high glycemic index foods such as sweets and fried foods, it will still exceed the regulation range of the residual islets and lead to a rise in blood sugar. If the number of times is more frequent, it will also lead to further deepening of the condition, weakening of the effect of surgical control, or even the need to rely on drugs for regulation again. The advantage of weight loss metabolic surgery is that it is effective in treatment and can reduce the burden on the patient, but it still requires the patient to develop good lifestyle habits, which all treatments for diabetes need to ensure. This is because many diabetic patients are suffering from the disease because of poor lifestyle and eating habits. If the cause of the disease is not eliminated, even if the disease is really completely cured, there is still a chance that the disease will return.