This study employs the generational accounting method to examine intergenerational transfers when there is a reform on old-age pension benefit of the Labor Insurance in Taiwan. We find that (1) "a decrease of payment salary level," "a decrease of credit of yearly services," or both are beneficial to the younger generations; (2) "accelerating the increase of insurance premium rate" is beneficial to the elder generations; and (3) a reform containing the above-mentioned three approaches is beneficial to the mid-age generations.