The invention relates to a transurethral intravesical operation instrument system for non-muscle invasive bladder cancer. The system comprises an endoscope with multiple passages, a) a tail end-bendable operation instrument with a bendable joint and/or b) a tail end-bendable operation instrument with a pre-bent pipe structure. According to the system, the tail end-bendable operation instrument with the bendable joint and the tail end-bendable operation instrument with the pre-bent pipe structure are independently matched with the endoscope with the multiple passages for use or the two operation instruments are simultaneously matched with the endoscope with the multiple passages for use, so that operation instrument tail ends in various shapes can be obtained, an encircling operating angle is formed, fine operation is facilitated, and an operated part can be observed in real time; compared with the prior art, the system has the characteristics of fine operation, all-angle operation, no blind zones, complete excision, convenience in the mastering of the excision depth, humanized operation and the like, the cure rate of non-muscle invasive bladder cancer is expected to be increased, operation complications are reduced, and the cancer recurrence rate is lowered.