This paper is a continuation of the authors' previous work of the same title, which focused on Jo Hui-sun's Sanhag Seubyu. We analyze the development of Joseon mathematics at the conclusion of this process of adopting Western mathematics. Joseon began the research on the Shixian Calendar (時憲歷) in the mid 17^th century. This resulted in the mathematical development in the 19^th century Joseon which incudes Jo Hui-sun's Sanhag Seubyu. Notably, Sanhag Seubyu demonstrates that wide spread was there a unique strategy developed in Joseon to adopt and apply advanced mathematics beyond the traditional level. This paper explores the content of Chapters 4, 5, and 6 among the seven chapters of Sanhag Seubyu, which reveals the unique characteristic of Joseon mathematics.

Yu Il Seon(柳一宣) is a person who actively engaged in pro-Japanese activities in Japanese colonial period. However, regardless of his pro-Japanese activities, he was an indispensable person in the history of mathematics education in Korea and was a pioneer in the field of secondary school mathematics education from the end of the Korean Empire(大韓帝國) to the beginning of Japanese colonial period(日帝强占期). In this study misleading information about Yu Il Seon and his activities in the field of mathematics education is corrected or supplemented. It is known that he graduated from the Tokyo College of Science(東京物理學校), but it does not appear to be true. <The Surihak Japji(數理學雜誌, Magazine of mathematics and Science)> is known to have been published up to the 8th issue, but it seems that the 9th to 10th issues have also been published. He wrote three mathematics textbooks and proofread three mathematics textbooks. The Jeongrisa(精理舍) is known to have been operating until 1912, but it was actually operated until early 1913. It does not appear to be true that journalist Jang Ji yeon graduated from the Jeongrisa.