In order to monitoring the flora change of Yongneup, an alpine wetland, survey of vascular plants was conducted. It found that flora of Yongneup was consisted of 249 taxa, i.e., 205 species, two subspecies, 36 varieties, and six formae. Among them, Korean endemic species was totally 18 taxa. Also, the conservatory plants classified from fifth to first grade by Ministry of Environment were distributed 71 taxa in the Yongneup area. It is shown this area is very high biodiversity. The naturalized plants were found only five taxa. Especially, Trientalis europaea var. arctica and Menyanthes trifoliata, rare and endangered species, were re-confirmed this time. However, we could not find some plants reported previously. Therefore, it needs more correct investigation in future.