I found evidence that Kim Y ˘ong (金泳, 1749-1817) is the author of the Korean Poch' ˘on'ga with New Charts published in 1792 by the Astronomical Bureau of the Chos ˘on dynasty. I reconstructed a history of Kim Y ˘ong from various literature remained in other persons' anthologies and governmental records. My findings on the author and publication year can help to solve the problem on the origin of star charts in the Poch' ˘on'ga with New Charts. I also considered the changes of Chinese Bu-Tian-Ge and their star charts after Chongzhenglishu (崇禎曆書). I found that the new charts in the book of Huantiantushuo published by Li Mingche (李明徹, 1751-1832) in 1819 are approximately the same to those in the Poch' ˘on'ga with New Charts by Kim Y ˘ong in 1792.