In Dongdae Bay, Namhae County, South Gyeongsang Province, A total of 451 taxa including 94 families, 290 genera, 406 species, 2 subspecies, 37 varieties, and 6 forma were surveyed. It accounts for about 9.23% of 4,884 species of vascular plants in Korea. Rare plant species designated by Korea Forest Service were appeared Campanula takesimana, Crypsinus hastatus. Korea endemic plants were appeared Populus tomentiglandulosa, Campanula takesimana, Sasa coreana Weigela subsessilis, Paulownia coreana. The special floristic plants were appeared Sedum takesimense, Peucedanum japonicum, Cynodon dactylon etc. 47 taxa. The naturalized plants were appeared Festuca arundinacea, Eragrostis curvula, Festuca arundinacea etc. 62 taxa, The rate of naturalization was 13.74%. Halophytes were appeared Silene aprica var. oldhamiana, Dianthus japonicus, Salsola komarovii etc. 26 taxa.