Minimally invasive weight loss surgery, called laparoscopic gastric bypass surgery, is a procedure that changes the structure of the intestines and shuts down most of the stomach’s functions. It is characterized by dividing the stomach into two parts, a smaller upper part and a larger lower part, and then amputating the small intestine and rearranging its position to change the way food passes through the digestive tract, slowing down the gastric emptying rate and shortening the small intestine, so as to achieve the effect of weight loss and diabetes control through the two-pronged approach of controlling the intake and reducing the absorption. Laparoscopic gastric bypass surgery began in 1994 and has become the internationally recognized gold standard in weight loss and metabolic surgery due to its strong weight loss effect and low surgical risk. It optimizes and improves the structure of the gastrointestinal tract in obese patients through a minimally invasive approach with laparoscopic navigation. This is because obese patients usually gain weight because of excessive intake or abnormal body absorption and metabolism. After laparoscopic gastric bypass surgery optimizes and improves the gastrointestinal tract, food intake, absorption, and metabolism can be normalized, so weight can be controlled. Generally obese patients who have undergone gastric bypass surgery can lose 8-12 pounds in one week after surgery, and 60 pounds in 3 months on average. And as long as the weight of obese patients reduced to the standard range will not be reduced again, a surgery can maintain the standard weight throughout life without rebound. And more importantly, gastric bypass surgery has become the most effective way to treat diabetes.