18세기 시장의 발달과 한 지식인의 시장에 대한 관찰과 접근, 그리고 동전의 유통으로 인한 개인 화폐경제생활의 변화를 권상일의 『청대일기』를 바탕으로 연구했다. 권상일은 농업중심의 자립적 가계경영을 강조 했다. 그는 이익(李瀷)등과의 교류 과정에서 상업 발달에 따른 사회적 사치 분위기에 비판적인 입장이었다. 권상일은 경상도 상주의 근암리에 살면서 경제적인 활동을 전개했다. 근암리는 행정구역으로는 상주에 속하면서도 거리상으로 문경, 예천, 함창, 용궁과 인접해 있었다. 권상일은 인근의 여러 장시 중 근암리 인근의 산양장과 주로 접촉했다. 상업에 부정적인 입장을 지닌 권상일이었으나 현실에서는 주변 시장의 동향에 대한 관심과 관찰을 게을리 하지 않았다. 그는 곡물, 어물 등이 시장에 등장하는 시기와 상인의 동향, 그리고 계절에 따른 곡물가격의 변동 등을 관찰했다. 권상일의 일기에는 현물로 주고받은 선물의 기록이 있다. 그는 節扇과 簡紙등을 주로 선물 받았으나 70세 이상부터는 곡물, 어물 등의 음식물에 대한 선물 비중이 증대했다. 원거리에 대한 선물과 부조는 동전을 이용했다.17세기 이전 곡물과 면포를 이용 한 매매활동과 달리 18세기 전반의 상황을 반영한 『청대일기』에는 경제생활의 중심이 동전으로 바뀌는 기록이 있다. 권상일은 약, 생선, 토지, 말 등을 매매하였으며, 이 경우 결재수단으로 동전을 이용했다.Based on Kwon Sang-il(權相一)'s diary titled “Cheongdae Ilgi(淸臺日記)”, this study investigated the historical development of Joseon's domestic market in 18th century, Kwon's observations and approaches to market from the viewpoint of an intellectual person, and changes of personal monetary economy life under the influence of coin circulation in market. Kwon emphasized independent household management based on agricultural activities. In the same context with feedbacks from his contemporary fellow scholars including Yi Ik(李瀷), Kwon pointed up his contemporary extravagant social atmosphere owing to commercial development and took critical positions about it. Kwon positively rolled out his economic activities while he lived in Geunam-ri(近嵓里), Sangju-mok(尙州牧), Gyeongsang(京畿) province. This region was characterized by local market developed owing to land routes as well as water transport permitted around Nakdong(洛東) River. Kwon used a herd of local markets distributed within a radius of 10 kilometers such as Sanyang Market(山陽市, in vicinity of Geunam-ri), or collected information on market. Kwon originally took a negative position about commercial activities, but tried to steadily observe and monitor his contemporary trends of local markets around his neighborhood in reality. On the regular basis, he surveyed trends of merchants crowding in local markets depending upon some variables such as market release time(of cereals, fishes and more) and weather. In local markets, he recorded cereals pricing based consistently on 1 Nyang(兩, an old Korean monetary unit), but paid attentions to variations of cereals pricing depending on crop(good harvest or bad harvest). Kwon considered price variation factors such as pricing manipulation initiated by merchants or variation of coin circulation. Records about gifts given and taken in kind accounted for significant part of Kwon's diary. Kwon's acquaintances including central and local government officials gave him(as a local noble who served as a series of high-ranking government posts) gifts like folding paper fan(節扇) and letter paper(簡紙) among others. When Kwon became aged over 60, he began to receive more food presents like cereals and fishes from his acquaintances. But he felt that they were excessive and burdensome beyond simple return presents. Notably, he used coins as a means of present and congratulatory or condolence gift for his acquaintances at remote sites. This phenomenon was a forerunner of gradual turnover from spot goods to coin economy. Contrary to Joseon's economic activities largely based upon cereals and cotton cloth(木棉, textile) before the 17th century, Kwon's “Cheongdae Ilgi” contained historical facts about turnover of economic focus from spots to coin in the early 18th century. Kwon traded in herbal medicine, fishes, land property and horse and used coins as a means of payment for the trade. In his contemporary days, coin became a crucial foundation for interpersonal creditor and debtor relations as well as fund-raising of local bodies like private school and Donghoe(洞會, local community self-governing bodies). Kwon valued the independent economy based on agricultural activities, but didn't leave any more detailed records about his experiences in economic life under the influence of developing market and activated coin circulation. Nevertheless, his diary records confirm that his economic life is based on coin rather than spots, or he revealed sensitive responses to even market trends in vicinity of his neighborhood. These records demonstrate results from changing economic environment such as coin circulation and market activation throughout the 18th century.