The conditions for cholecystectomy are: 1, no symptomatic gallbladder stones, not in the inflammatory phase. 2, The gallbladder must have good contractile function: oral cholecystography or ultrasound indication after lipid meal: gallbladder contraction up to 1/3 or more. 3, the gallbladder cannot be too large or too small, the long diameter of the gallbladder is between 6-8cm, and there cannot be separation within the sac. 4, the upper abdomen should preferably have no history of open surgery, perforation and other acute inflammation history. 5.B ultrasound: good intra-biliary sound transmission, smooth gallbladder mucosa, gallbladder wall within 3-4mm, single or multiple stones, regular shape, stones can be moved with the change of body.