Abstract: The flora of Changwonsi was surveyed from August, 2004 to Julyl , 2005.The vasclllar plants of this area consists of 39 orders, 110 families , 416 gencra, 690 species, 1 subspecics, 88 varieties, 7 formas and have a total of 786 species.In the vasclllar plants of this area, 688 species at the mOllntain and valley site, 376 specics at the ri vcr site and 291 species at the reservoir site was cOllnted.On the other hand , 67 spccies in thc natllrali zed plants, 18 species in the cndcmic plants and 2 species(J, ψersollia dllbia , Ew)"ale ./('1"0,\") in thc wild plant protected by the Ministry of Environment(2005, llgrade) and Natul떠 monument 1 64(Kalopalla.\"pifllS) was countcd