The gallbladder is located in the right upper abdomen of the body, on the dirty side of the liver, while the pancreas is mainly a retroperitoneal organ, which is placed transversely in the plane of the 1st-2nd lumbar vertebrae in the posterior abdominal wall and can be divided into 4 parts: the head, neck, body and tail of the pancreas, which is surrounded by the duodenum in a C-shape. The cystic duct opens with the common bile duct, and the common bile duct and pancreatic duct open together in the large duodenal papilla. Therefore, clinically, diseases of the biliary system and the pancreatic system share the same features, such as common bile duct stones may induce acute pancreatitis.