The bladder can be removed, the bladder is one of the main organs of the urinary system, it is connected to the bilateral ureter on the top and the urethra on the bottom, and it plays the role of storing and draining urine. When there are some lesions in the bladder, especially bladder tumors and bladder cancer, when the tumor is relatively large, invades the muscle layer, or multiple tumors, it is possible to do partial cystectomy or total cystectomy. After total cystectomy, the problem of urination still has to be solved, and urinary diversion has to be done in the following ways: 1. The simpler one is to do bilateral ureteral skin stoma, which connects both sides of the ureter directly to the skin, this method is relatively simple, but the patient needs to wear a urine bag for a long time, which is not very convenient for life. 2. To do in situ neobladder, which means to use the small intestine, the large intestine, or even the stomach, to make a new bladder, with the The ureter and urethra are connected to solve the problem of urine storage and urination. The operation is relatively larger and more complicated, but the patient’s quality of life is higher after the operation.