The purpose of this study is to search for principle-based Korean language standard by extending recognitions on the standard and thus reorganizing contents system in grammar education. The status of Korean language standard has been gradually increased. However, the results of questionnaire survey show that the Korean language standard knowledge is recognized by learners as the knowledge that is disconnected with reality and other grammar knowledge and also has no hierarchy. Such problems can be solved through systematic modifications of Korean language standard education, ahead of changes in instruction-learning of it. Therefore, principle-based Korean language standard education was considered. Sum of provisions of language regulation does not correspond to the principle of Korean language standard knowledge. The principle of Korean language standard knowledge is derived from the fusion with other grammar educational contents. Hence, re-conceptionalization was realized by extending the recognition on `Korean language standard`. If the scope of Korean language standard knowledge is extended, then its parallel connection with knowledge of Korean language structure is not established, but the relation in which the knowledge of it is transformed into Korean language standard knowledge, so that it can be used in real language life, would be formed. Thus, Korean language standard education may achieve the purpose of better communication.