This paper attempts to analyse Korean court`s case opinion in terms of its function, role, and significance in the legal system based on the assumption that the case opinion could play significant role for the enhancement of judicial democracy and the institutional development of judiciary. This paper suggests that court`s case opinion should be written in the way which allows any third party could review and verify the appropriateness of the decision. For this purpose, a case opinion must provide the legal standard as an interpretation of the applicable law which it chooses and its application to the facts of the case to show how it reaches the decision.