The present study aims to developing competence for Korean textbook evaluation in pre-service education. For this purpose, this study conducted a mock textbook selection test to the pre-service Korean language teachers attending College of Education and Graduate School of Education, and closely examined how they understand measurement scale and how they apply them. Through the analysis, the study elucidates three important things for pre-service education. : 1) clear knowledges on textbook selection, especially regarding to meaning of evaluation factor and evaluation attribute, that should be provided to pre-service Korean language teachers, 2) an outline of textbook selection strategies that should be learned with its specific situation, 3) pre-service education process that should be established systematically with curriculum reorganization.