The purpose of this study was to evaluate the diagnostic and monitoring value of Ice Water Test(IWT) in neurogenic bladder. Ice water test(warm and cold) and cystometry were performed on 30 neurogenic bladder patients. There were good correlation between the warm IWT and cystometry, cold IWT and intravesical pressure. But, there were poor correlation between steep volume and cold volume. Among 30 patients, 9 patients showed volume difference(>100ml) between warm IWT and cystometry volume. The difference of volume was more common in quadriparesis patients.