The aim of this article is critically to investigate the religious education which happens at the elementary and secondary school in Korea. According to fact that some members of National Assembly of Korea recently have proposed a revised educational bill toward more strong neutral orientation of religious education in all the elementary and secondary school in Korea, this article deals with three issues by the perspective of Christian private school like below. First of all, this essay is to analyses several conflicts about religious education at school including conflict of educational aims, conflict of curriculum, and conflict of educational system of Korea. Second, the common arguments about religious education in academical field are verified in terms of reciprocal relationship between the meaning of religion and education, harmonious origins and development of Western schools between faith-based Hebrew tradition and rational-based Greek tradition, various types of religious education at school, and administrative transparency of Christian school. Lastly, on the basis of some academical common arguments about religious education at school, this article suggests double strategies for religious education in Korea. In other words, in the educational context where the separation between the state-based school and the private school in Korea is very difficult, for the Christian schools who are interested in their faith education, Christian value-laden religious education is needed; however, for those who are only interested in just value-free religious education like the state-based school it is needed toward the neutral point view of religious education.