This study aims to analyze the current status of religious education in Korean Catholic secondary school and to identify the problems of them, suggesting ways to improve religious education in the Catholic school based on the position of the Catholic Church. For this purpose, this study examined the current state of religion education for religious teachers and students of Catholic secondary schools in Korea. And this study compared the results of the research conducted in 1998, and confirmed the trends in how religious education and related environments of Catholic secondary schools have changed over the past 20 years. So this study suggests current problems and future directions by analyzing the degree of change in religious education. The comparison between the 1998 survey and the 2016 survey is as follows: (1) With regard to the content of religious class, the proportion of classes directly related to religion decreased while the proportion of ‘ethics, moral and personal education’ classes increased. In addition, the satisfaction level with religious textbooks has increased, but the proportion actually used has been lowered. (2) In respect to religious education conditions and the environment, the proportion of teachers who have obtained ‘completion a course in teaching profession’ and ‘Seoul National University Training’ increased. Also, many of the religious teachers themselves recognized that the educational condition and environment did not improve. (3) it was confirmed that both students and teachers had a higher perception of religious education, compared to the past. However, the rate of students, who accepted religious education negatively for no particular reason, increased. The direction of religious education in Catholic schools proposed in this study is as follows: (1) Establishing the objectives of religious education in the catholic school (2) Increase the use of religious textbooks (3) Religious education that attracts students interest and motivation (4) Cultivating and improving the environment of religious teachers (5) Religious education as a regular subject (6) Correct awareness of educational policy (7) Religious education that reflects the characteristics of students and changes in society.