This thesis is critical reconsideration of methodological assumption of educational theory in Korea. In the last century, educational theory in Korea has been developed and accomplished very much in quantity, but it has revealed poverty in theoretical quality because of its methodological limits. Its scientistic methodology based on the logical positivism is old fashioned narrow paradigm of science which is originated in modern Newtonian physics. This paper discusses the necessity and possibility of new methodology of educational theory based on the paradigm of \'new science\' which is developed by new physics in 20th century. It is on the belief that it can make educational theory more affluent and help education to be a main subject of humanities.