Researcher elucidate the structure of critical thinking through analysis and systematization for the concept and the sub-factors of critical thinking, and describe the point of view and the criteria for assessment of critical thinking through literature review. Critical thinking which is the main goal of the Korean language and the power means of learners set at the level as the goal, in the situation what was uncertain the implications and the concrete reality of critical thinking, what was not set the teaching-learning method and the true assessment system which was substantially intended to learners` critical thinking. The detailed description of critical thinking` structure can be approached the essence of critical thinking. When based on a thoughtful understanding of critical thinking, we can advance teaching-learning reflected the sub-factors and the characteristic of critical thinking, furthermore critical thinking of learners can improve more and more. Because the attribute of thinking is abstract and thinking is working syntagmatically by many factors, a study is a limit. But through literature review in the analysis and conceptualization process of critical thinking, the substance of critical thinking can become distinct more and more. The plans and practices that critical thinking of learners can promote at the chalkface can be established till substance and factors of critical thinking are the foundation. Therefore researcher classify skills and disposition with critical thinking to promote increased understanding about the concept and the structure of critical thinking. And the subcategory of critical thinking skills was classified as conceptualization, analysis, synthesis, inference, judgment. And the subcategory of critical thinking disposition was classified as pursuit of truth, value of ground, intellectual independence, openness of thinking, carefulness of thinking, self-reflection. A study extract the core characteristics of critical thinking so that establish the point of view and the criteria for substantive assessment of critical thinking.