This paper is designed to examine significant differences between the first-edition and the revised-edition of Dusi-Eonhae. Dusi-Eonhae that were printed in 1481 for the first time is one of the important references in the Middle Korean. Meanwhile, Dusi-Eonhae that were revised partially in l632 is one of the important references in the Modern Korean. It has been considered so far that the linguistic differences between the first-edition and the revised-edition of Dusi-Eonhae were highly significant between the middle ages and modem ages in Korean. Therefore, this paper focused on changes of notational system among significant linguistic differences that were showed in the first-edition and the revised-edition of Dusi-Eonhae. As a result, some facts that were revealed in the revised-edition of Dusi-Eonhae is as in the following. Firstly, Side dot, with which mark syllable intonation, `Δ` and `δ` were disappeared completely. Secondly, consonant, `ㅅ` and `ㄷ` placed under a vowel in syllable were used with disorder. Thirdly, syllabication that divide noun from postpositional particle and verb from inflectional ending appeared. Beside those, Case postpositional particles and fortis notation system, etc. were used with disorder.