The purpose of this study is to investigate characteristics of ‘-dani’ in various linguistic levels such as pronunciation and intonation, morpheme and sentence, discourse and pragmatics and to suggest not only its descriptive methods in Korean educational grammar for foreign learners but some references for descriptions of other ‘-dago ha-’ contraction forms. In the previous studies, ‘-dani’ has not been investigated as its own, whereas has been partly mentioned as one of the ‘-dago ha-’ contraction forms. As a result, its various information according to language levels has not been explored. ‘-Dani’ shows most various meanings in ‘-dago ha-’ contraction forms. If the description on ‘-dani’ in various linguistic levels could be suggested, other ‘-dago ha-’ contraction forms such as ‘-dago’, ‘-damyeonseo’, ‘-danika’ are expected to get its description references from it. In various linguistic levels, this study especially would focus on discourse-pragmatics information of ‘-dani’ since it is related to highly complicated factors of its communication situation such as a speaker, a listener, a situation itself, so is difficult to be described as a whole. Also, this study would introduce comparison as a main method since comparison between common things and differential things can be effective to foreigner learners than any other methods.