Extracorporeal shock wave lithotripsy is not effective in treating pelvic calyx stones, and stones in the diverticulum of the calyx with calyx neck stenosis have long been a very difficult situation for urologists to deal with. In the past, stones could only be removed by percutaneous nephrolithoscopy or open surgery, or the stones could be left untreated and the patient could be followed up. Although percutaneous nephrolithotomy is a minimally invasive procedure, the procedure requires access through the kidney parenchyma, which is still more invasive and risky. Therefore, we have been looking for a more minimally invasive method to manage such complex kidney stones. The ureteral flexible scope, which can be actively bent and can observe the upper urinary tract areas that cannot be reached by rigid ureteroscopy such as the pelvis and calyces, is a milestone in the history of the development of endoluminal urology and is currently the best means to manage the above-mentioned complex kidney stones. Ureteroscopic surgery is done under direct vision through the natural lumen (urinary tract), which is less painful and quicker to recover, and leaves no scars on the body surface, truly achieving the treatment of kidney stones without “scars”. Even for many urologists, ureteroscopic technology is still a new thing and a blind spot. The clinical application of ureteroscopy technology, especially for the treatment of intra-pelvic calyces and intra-diverticular calyces, which are difficult to treat kidney stones, has achieved very good results. After introducing our experience and achievements in the clinical application of ureteroscopy in the academic activities of urology, we have been praised and commended by our urology colleagues in the province.