This paper is intended as an investigation of what is the characteristics of the borderland language from the viewpoint of reformational direction, by surveying a part of Hadong regional dialect in Gyeongnam, used in Seomjin Riverside facing Yeongnam Area. The subjects of investigation is as follows: First, sentence intonation and simple vowel system in the phonological aspect. Second, interrogative sentential endings in haera style(해라체) and objective case marker in the morphological-syntactic aspect. Third, ``ha-(do)`` generic verb, ``na(me), neo(you), jeo(himself/herself)`` personal pronouns, ``saekki(straw rope)`` and ``balchae(wicker rack attachment for an A-frame pack)`` in the lexical aspect. We could find out five important facts through this discussion as follows: Firstly, in the many components such as phonological, morphological, syntactic, lexical and semantic ones, Hadong regional dialect keeps parallel pace of the characteristics with other Gyeongnam regional dialect, although we didn`t refer to every one of them in this paper, Secondly, some parts such as sentence intonation, eul/reul accusaive case marker, ``ha-(do)`` generic verb and ``saekki(straw rope)`` are influenced strongly by Jeonnam regional dialect. Thirdly, the personal pronouns of Hadong regional dialect such as ``nae (내), ne(네) and je(제)`` corresponding to standard forms of ``na(me), neo(you), jeo(himself/herself)`` respectively are a series of words whose center of the reformation is Hadong and whose influence spreads around some areas. Fourthly, the forms of interrogative sentential endings in haera style(해라체) show us very interesting paradigm, because there are admixture of Gyeongnam or Gyeongsangdo style of dialect(-go?), Jeonnam or Jeollado one(-nya?) and that is peculiar to the Hadong one(-ne?) in the forms. Fifthly, we think the simple vowel system in Hadong regional dialect was established on the system of Gyeongsangdo regional dialect and was affected some elements of Jeollado regional dialect. But it seems that this subject requires more efforts.