The vascular plants of the studied area in this site was listed as 333 taxa; 88 families , 226 genera, 289 species, 1 subspecies, 39 varieties, 4 forms. Based on the list of Korean endemic plant, 4 taxa were recorded; Populus tomenüglandulosa, Salix purpurea var. japonica, lndigofera koreana, Weigela subsessilis. Specific plant species by floral region were total 15 taxa; 2 taxa (Monochoria korsakowi, Spiraea salicifolia) in class llI, Ottelia alismoides in class II , 10 taxa (Sagittaria aginashi,Salix glandulosa,Alnus hirsuta, Quercus variabilis, Stellaria filicaulis, Pyrus ussuriensis, llex macropoda, Grewia biloba var. parviflora, Vaccinium oldhami, Cirsium pendulum) in class 1. The naturalized plants in this site were 12 families, 27 genera, 36 species, 1 varieties, 37 taxa and naturalization rate was 11. 1% of all 333 taxa vascular plants. 80, wild plants disturbing ecosystem like Ambrosia artemisiifolia var. elatior have been increasing and it needs continuing control and conservation measures on the plant ecosystem.