The inkstone, one of the scholar's civil servants, was as essential as today's computers. The Namposan inkstone was said to be the most precious of such scholars' essential inkstones. As recorded in the Journal of the Executive Economy of Seo Yoo-gu, a scholar of the Joseon Dynasty, Seokrakyeon, Geumsamunyeon, Eunsamunyeon, and Baekwoonjin Sangseokyeon are the best treasures among the Nampo stones excavated from Seongju Mountain in Nampo County. Many people wonder why the Boryeong area was called Nampo inkstone in the past because Nampo County was the famous inkstone from that time. The flower stone, which is the best quality among the Baekwoonjin Sangseokyeon, contains beautiful patterns on some of the inkstone stones, and the Namposan stone is of excellent quality enough to become the first-class inkstone with even a slight trimming of most natural stones. As the modern society enters, the use of inkstones is gradually decreasing, and 60-70% of the inkstones produced in Korea are made from Boryeong, so Boryeong claims to be the birthplace of the inkstone. In 1987, the Nampo inkstone production function was designated as the Intangible Cultural Property No. 6 of South Chungcheong Province.