The purpose of this study is to present a methodology for processing corpus in order to lay the foundation for comprehensively observing the use of Korean affixes by Korean learners. As basic data for preparing the corpus processing methodology, we will use the <Korean learner corpus> distributed by the National Institute of the Korean Language. However, it should be noted that the Korean affixes is not fully analyzed and reflected in the <Korean learner corpus> that has inherited the construction system of <Sejong Corpus>. Therefore, in order to compensate for this, I would like to analyze the list of all affixes listed in the <Standard Korean Dictionary> of the National Institute of the Korean Language. Only after going through this process will the full extent of Korean learners' affixes usage be fully observed with arsenic. In other words, it will be possible to analyze the usage pattern of Korean affixes used by learners, to analyze quantitatively and qualitatively the types of roots combined for each affixes, and to lay the foundation for thorough description by examining the errors in the learner's affixes use and root errors. It is expected that the results of the analysis of the pattern of Korean learners' use of affixees based on these data can be used for learners' vocabulary education.