This study aimed to validate the essential mental processes, namely the perception-choice process and the moral filter, in the PEA model within the Situational Action Theory(SAT). To achieve this, the study examined the effects of low self-control and various dimensions of morality on cyberbullying among a total of 5,151 adolescents. The analysis revealed that low self-control and all moral factors significantly influenced cyberbullying. Concerning interaction effects, only moral rule interacted with self-control, impacting cyberbullying. Additionally, the effect of self-control varied depending on the level of moral rule, supporting the role of the moral filter and perception-choice process. Despite limitations in the secondary data and methodology, this study empirically explored the seldom-studied Situational Action Theory(SAT) in the domestic context, contributing to experiential research and providing policy implications by emphasizing the importance of moral rule.