The omnipresence of new media has changed the nature of people’s lives and their means of acquiring knowledge. Mediatization theory has emerged from the European continent as a means of exploring the social world. The researcher constructed a dialogue with the aforementioned conceptual framework of mediatization theory published internationally in recent years and borrowed certain perspectives from the narrative communication research. First, this study examined the concept of mediatization and its role in social construction. Second, it explained the conceptualization of communicative figurations, deep mediatization, and audiencization. Finally, the study analyzed the #MeToo movement in a Taiwanese context to interpret the transformation of audiences during narrative participation in transmedia storytelling through “narrative worldmaking” in the age of deep mediatization.