Entering the 19th century, Korean language textbooks had been written by western missionaries and foreign diplomats. So Korean language textbooks introduced unfamiliar Korean language and Korean culture into Korean language learners. But at the times, because the study of Korean grammar was going on, Korean language textbooks described Korean grammar in the frame of Western grammar. By these reasons, Korean grammar was misunderstood in several points, for instance, it was classified not only Josa (Korean particle) as an affix or a postposition but also an adjective as a modifier. But Korean language textbooks described politeness expressions and auxiliary verbs in detail. Especially, they described Korean honorific expressions importantly in Korean grammar, because they showed the distinction between Korean grammar and Western grammar. It was possible for this analysis to know how foreign learners understood and learnt Korean grammar. Moreover, it was possible for this analysis to know the effective method of teaching Korean grammar. (Seoul National University)