The purpose of this article is to critically assess the “Religious Studies” textbook of Protestant school in the perspective of religious peace. The textbook, developed and approved under ‘2015 Revised Religious Studies Curriculum’, aims to develop a reflective insight and appropriate attitude for religious peace in the multi-religion and multi-cultural context. Therefore, this article defines religious peace as “a process of reducing conflicts and trauma from religious issues and expanding equality and harmony among religions at the same time” and suggests core concepts of religious peace. Based on those concepts, this article explores three different areas of interest. First, this article analyzes three different textbooks used in Protestant School. The analysis recategorizes “Religion and Life” (2018) and “Religion and Livelihood” (2018) as an education for Christian faith rather than religious peace, but regards “Religious Studies” (2018) as an exemplar of religious peace education. Second, this article discovers which social issues and power dynamics are latent in the distinguishment of religious textbooks into faith educational type and religious studies type. In fact, it uncovers the ongoing conflict between the power of ecclesial ministry and the power of civil�academia and finds out inter-religious conflicts like a vandalism of Buddha statue by Christian emphasizes the issue of religious peace. Last, it suggests a future direction of ‘2015 Revised Religious Studies Curriculum’ based on the findings mentioned above. More specifically, it calls for the need to modify the name of religious studies curriculum into ‘religious peace’ curriculum, to develop a separate textbooks for Protestant School and National School on the subject of religious studies, and to create free agent textbooks.