This study examines the emergency and significance of Grey pottery in Baekjeon Yesan-ri remains, Seongju. The research findings show that Grey pottery in Baekjeon Yesan-ri remains, Seongju, emerged between the end of the 2nd century B.C. (PeriodⅠ-1) and the beginning of the 1st century B.C., and continued until the middle of the 2nd century (PeriodⅡ-1). The date of earthenware excavated from the 3rd tomb of wooden coffins in Baekjeon Yesan-ri, Seongju was thought to be the 2nd century B.C. based on the fact that Clay band pottery and pouch-shaped pottery with clay band were found along with them at remains of Hagu-ri and Bukto-ri, Gyeongju, as well as Paldal-dong, Daegu, and also in reference to the period of Clay band pottery excavated from the first tomb of wooden coffins in Gyodong-ri, Ulsan. Therefore, it is possible to adjust the presumed period of the Pottery with stamped design that had been entered to the basin of Nakdong River up to the 2nd century B.C. Over Daegu region adjacent to remains of Baekjeon Yesan-ri, Seongju, with Nakdong River as the boundary, remains are scattered at Paldal-dong, Hakjeong-dong, Seobyeon-dong, Sinseo-dong, etc. The groups in Baekjeon Yesan-ri, Seongju, and in Paldal-dong, Daegu, maintained the equal status in the early stage of Grey pottery, but in the latter period of Grey pottery, the spread of the group in Paldal- dong, Daegu, was likely to be accelerated. Specifically, in the 1st century B.C., the burial earthenware and metalware composition of the wooden coffin tombs excavated from No. 1, 3, and 31 of Baekjeon Yesan-ri, Seongju, were similar to that of No. 45, 94 of Paldal-dong, Daegu. In Seongju region, there were no known remains of the Proto-three Kingdom Age which connected the Bronze Age and the age of the Three Kingdoms until the archaeological evidence of the Proto-three Kingdom Age was found in remains of Baekjeon Yesan-ri, Seongju. It is expected, therefore, that there will be a comprehensive discussion on Seongju in its stage that small political states formed.