Ureteral chondroscopy is a slim, bendable endoscope that enters the kidney through the natural lumen of the human body and, together with Holmium laser, lithotripsy mesh basket and other advanced equipment, crushes and removes large and small stones from the body. Advantages of ureteroscopic lithotomy: ①Non-invasive surgery and fast recovery after surgery: less tissue damage during surgery and shorter hospital stay after surgery than traditional surgery. ②Maximum protection of kidney function: Ureteral flexible microscope has no incision and perforation hole in the kidney during the completion of stone extraction. The kidney unit is preserved to the maximum and the kidney function is protected. The following cases are more suitable for ureteroscopic lithotomy: ① kidney stones and upper ureteral stones without fluid; ② stones in the lower renal calyces; ③ ureteral stones and kidney stones that have been treated with extracorporeal shock wave lithotripsy; ④ urinary stones with bleeding tendency; ⑤ renal calyces diverticula with stones; ⑥ isolated kidney, ectopic kidney, transplanted kidney stones.