The purpose of this study are as follows; (ⅰ) Discribe the phonological system in (ⅱ) Discribe the morphophonological rules in The result of this sudy are as follows; (ⅰ) a. The consonantal system same 19th Korean. b. The vowel system allmost same 18th Korean. (ⅱ) The morphophonological rules almost same 18th Korean.
