In a democratic society, diverse interest groups are to engage in education policy making processes. However, education policies in South Korean society have been predominantly decided by a few policy leaders. Meanwhile, a public opinion formation is recognised as an alternative way to enhance democracy and public concerns in education policy formation. Therefore, this study explores some major issues relevant with public opinion formation process concerning education policy decision-making. From literature review, five main issues were identified. Adopting these as an analytical framework, this study examines two cases of public opinion formation, a reform of college entrance system and a ‘comfortable school uniform’. The implication of this study are as follows: Firstly, as to the topics of public opinion formation, we should select issues that affect a majority of citizens. A level of specificity about the topic should be also considered. Secondly, a supervision body should be autonomous and independent from the government. Thirdly, a priority in the procedure is a deliberation in the learning process, which is to be transformative for participants. Fourthly, representativeness and equity should be guaranteed in selecting participants. Especially, the participation of students should be considered. Fifthly, a systematic mechanism is to be prepared to ensure that education policy reflects the outcomes of public opinion formation in a specific way.