This study aims to investigate and establish a methodology for contrasting lexical systems of dialects. It was discussed what kinds of criteria for the sake of cross-classifying could be introduced firstly, and then the trends of researches on dialect vocabulary were reviewed by the results of classification. There are four different criteria; ①start point(directionality) of study(onomasiological vs. semasiological), ②the number of research object(one word vs. multiple words), ③temporal characteristics of study(synchronic vs. diachronic), and ④linguistic level(phonological, morphological, syntactic, lexicological, semantic, or pragmatic study). This research concentrates on the contrast between lexical systems of different dialects. In other words, this takes the stances which ①basically base on onomasiological approach but partially apply semasiological analysis, ②take multiple words as objects of study, ③explore the meaning of words synchronically, and ④contrast the lexical systems. It is a novel and significant study because the contrastive approach to dialects like this is an unfamiliar and neglected research domain. Especially this study does not take for granted standard language as a criterion of comparison for dialect study.