Kidney stones are a common and frequent disease in urology. Its main clinical manifestations are lumbar pain, hematuria, hydronephrosis and intractable urinary tract infection in severe cases. At present, there are various surgical treatments for kidney stones: for smaller kidney stones, such as those less than 1cm, extracorporeal shock wave lithotripsy can be used; stones larger than 2-3cm or even larger can be lithotripsy by percutaneous nephrolithotomy, and of course the traditional nephrotomy is still used in some special cases. With the continuous advancement of technology and equipment, there is a more minimally invasive method for the treatment of kidney stones, namely ureteroscopic technique. A flexible ureteroscope is a slim, flexible and bendable endoscope. It can pass through the natural lumen of the human urinary system, i.e., retrograde through the human urethra, bladder, and ureter into the renal pelvis to locate stones in the kidney. The most important feature of a flexible ureteroscope is that the head end of the scope can be bent up and down at a large angle, allowing observation of all corners of the renal pelvis with almost no blind spots. Since the ureteroscope is equipped with an operating channel, the laser fiber can enter the renal pelvis through the channel and use the laser energy to break the stone, while the stone can also be “fished” out of the kidney by using the special lithotripsy tool of the ureteroscope, with immediate results. The patient was discharged from the hospital the day after the surgery. Since the ureteroscope enters the renal pelvis from the natural lumen of the human urinary system, there is no wound after the operation, which really achieves the purpose of non-invasive, and is the preferred treatment method for kidney stone patients. Of course, due to the high price of ureteroscopy equipment, easy to wear and tear, and high technical requirements, only a few large hospitals with strong comprehensive strength can carry out this technology on a large scale in Shanghai. Since the introduction of this technology in 2011, the Department of Urology of the Ninth People’s Hospital has treated hundreds of patients with kidney stones without any complications and with very satisfactory surgical results, bringing a blessing to patients.