Ureteral flexible mirror is an emerging lumpectomy technology, which is a special high-tech diagnosis and treatment equipment for urology, with advanced optical transmission system, digital imaging system, equipped with a full set of lithotripsy and stone extraction equipment, which is expensive and requires high operation technique, and must be performed by skilled senior experts. Ureteral soft mirror is slim and soft, no damage to the mucous membrane of ureter and renal pelvis, and the end of the mirror can be bent up and down 180 degrees to 270 degrees, which is conducive to more convenient observation and treatment of renal pelvis and calyx stones, especially when dealing with calyx stones that cannot be observed and treated by rigid mirror. Holmium laser is a laser fiber that can be bent at will. Under the guidance of ureteroscope, Holmium laser is used to find the stone directly along the urinary tract through the urethra, and the laser beam acts directly on the stone, causing it to disintegrate immediately. It is especially suitable for the treatment of “imaging blind spots” that cannot be seen by rigid scopes. Traditional percutaneous nephrolithotomy requires an incision in the lumbar region, but because of the slim and soft body of the ureteroscope, which can be bent at a wide angle, and the Holmium laser’s ability to bend at will, the combination of the two can treat urinary stones without incisions and directly through the natural channels of the urethra, bladder, and ureter, reaching all the calyces in the kidney and finding the stone with ease, safely, completely, and almost The stone can be completely broken down safely, thoroughly and almost non-invasively. In this way, the concept of early treatment of all types of kidney stones can be realized. The disadvantage of ureteroscopy is that for stones that are too large, the procedure takes a long time and therefore cannot be solved in a single session, requiring multiple procedures in stages until they are completely broken up. The following is the scope of application of ureteroscopy: 1) Diagnosis: unexplained upper urinary tract dilatation, suspicious occupancy, hematuria, lumbar pain, and follow-up after intracavitary treatment of uroepithelial tumors. 2. Treatment: ① upper urinary tract stones that are difficult to be reached by ureteral rigidoscopy, retrograde lithotripsy (single or multiple kidney stones, generally ≤20 mm in size; if the stones are larger, staged surgery may be required); ② intraluminal resection of certain upper urinary tract masses; ③ intraluminal treatment of upper ureteral stenosis; ④ holmium laser vaporization or electrocoagulation for upper urinary tract bleeding; ⑤ treatment of urinary tract obstruction and stricture after urinary diversion. . ⑥Special groups: for example, pilots and other occupations require that they cannot have stones; patients who need to go to remote areas, go abroad and other inconvenient medical treatment.