In this study, a suitable test tool for the Korean situation was developed and validated by supplementing the limitations resulting from cultural differences between the East and West in test tools related to epistemological beliefs. Based on this scale, the structural model of the optimal epistemological belief was confirmed. For this purpose, eight sub-factors such as organization of knowledge, certainty of knowledge, source of knowing, justification of knowing, ability of learning, effort of learning, process of learning, and speed of learning, and 53 corresponding items were extracted from previous studies to produce a preliminary test tool. Through exploratory factor analysis for this test tool, a test tool consisting of seven factors and 27 questions excluding learning speed was finally developed. The validity was tested through confirmatory factor analysis, and various models were formulated to understand what structure the seven sub-factors form and how they constitute epistemological beliefs. The optimal model was explored through the model suitability index. In conclusion, the epistemological belief structure supported a multi-factor rather than a single factor and a multi-dimensional model, rather than single dimension. Based on these results, the possibility of a three-dimensional structure model of epistemological beliefs was discussed.