This study presents a comprehensive research framework for analyzing the related social factors for supporting the abolition of capital punishment in Taiwan. Included in the study are the possible social-demographic transition factors (i.e. post-materialistic values), social situational factors (including reactions of fear, anxiety and anger to crime, attitudes toward a criminal's just desserts, the perceived humanization of the criminal justice institutions, attitudes toward the basic human right to life, and sense of social justice), and social conditional factors (including those perceived conditions for supporting the abolition of capital punishment, e.g. alternatives to capital punishment). The possible individual, combined, or inter-mediated effects of these three social factors are analyzed by collecting face-to-face interview data from 200 aged 20 and above respondents in Taiwan. The proposed research framework receives storing empirical support from the data analysis. The social demographic transition factor (in terms of policy-oriented post-materialistic values), social situational factor, and social conditional factor are all very influential in affecting respondents' attitudes toward the abolition of capital punishment. The latter two factors partially inter-mediate the direct effect of the social demographic transition factor on respondents' attitude toward the abolition of capital punishment. Attitudes toward a criminal's desserts and attitudes toward the basic human right to life are the two most robust and consistent direct effect variables in addition to the inter-mediated policy-oriented post-materialistic value variable. All the three variables have a very important and explicit policy implication for the current movement of the abolition of capital punishment in Taiwan.