In this study, differents caracteristics of intonation in Cheju Dialect are analyzed and described by experimental phonetic method(PCquirerX). Cheju Dialect speakers older than 70 are informants (8 female speakers) and their discourse in conversational situation are used as corpus for this study. 6 Intonation patterns which are frequently realized in Cheju Dialect are presented as typical Cheju Dialect Intonation patterns: /(rising pattern), ∨(emphasis rising pattern), ＼(falling pattern), ￢(emphasis falling pattern1), ∧(emphasis falling pattern2), ∩(emphasis falling pattern3). These patterns play important roles for organization of conversational discourse by mutual influence and by mutual contrast. Speakers use intonation pattern`s variability as their expression tool and in terms of discourse strategy. Differents aspects of Cheju Dialect Intonation patterns are also analyzed, discribed and interpreted to reveal dynamism and richness of this dialect, one of Korean dialects, spoken in Cheju Island.