The aim of this study is to examine the educational value of the academic debate by focusing on the essence of cross examination and also to prepare a cross examination strategy as educational contents. In academic debates, cross examination is not a tool to thwart opponents by verbal arguments, but a core device of debate to verify any truth for solving problems in the community. To figure out the contents of cross examination, the study analyzed actual debate data of middle school students and verified the implementation of cross examination. As a result of the analysis, the average number of questionnaires was 5.1 times per cross examination stage, and most were one time questions on simple reasons their basis. What are necessary for education include in-depth questioning on the validity of verification elements and the logical connection relation between verification elements and forming chain structure between confirmation and verification questions. As a result, the study established the educational content system of cross examination based on the essence of cross examination and learner`s implementation. And, the study proposed a strategy of cross examination according to the thinking process of learners on the educational contents elements.