Abstract:【Objective】 To investigate narrow-band imaging (NBI) cystoscopy in the detection of bladder cancer. 【Methods】 Patients received white light imaging (WLI) cystoscopy first then NBI cystoscopy. Biopsy was done in narrow band imaging mode and rechecked in white light and NBI mode. 【Results】 468 biopsies by narrow-band imaging cystoscopy were carried out in 243 cases . A total of 468 lesions were harvested. 113 patients with 214 lesions were confirmed bladder transitional cell carcinoma by pathologist.For primary bladder tumors, 100 patient with 193 lesions were founded, 153 lesions were confirmed as bladder transitional cell carcinoma. For recurrent bladder tumors, 27 patients with 80 lesions were founded, 61 lesions were bladder transitional cell carcinoma. NBI cystoscopy detected additional 10 tumor lesions in 6 patients compared with WLI cystoscopy. No lesions could be found by WLI cystoscopy while overlooked by NBI cystoscopy. 【Conclusion】 Compared with WLI cystoscopy, NBI cystoscopy increases the detection rate of recurrent bladder cancer .