This study was conducted 13 surveys from 2007 through 2012. The surveys on the entire plants distribution in the Ungseokbong Mountain found 491 taxa in total: 99 families, 290 genera, 419 species, 3 subspecies, 61 varieties, and 8 forms. 1,211 specimens were secured as evidence. In particular, 11 taxa of the rare plants which were designated by the Korea Forest Service were confirmed, and 12 taxa of the endemic plants were confirmed in this study. Those plants above Class III of the specific plants designated by the Ministry of Environment were confirmed 19 taxa. Among them, in particular, it was confirmed that Kirengeshoma koreana Nakai has a new habitat in the Unseokbong. Naturalized plants included 34 taxa accounting for 6.9% were representatively confirmed.