The study was carried out to investigate moth (Lepidoptera) twice at Ui-do Island on May 31 and August 30, 2011. A total of 121 species belonging to 11 families were identified. Based on dominance by families, Noctuidae, with 50 species, was the most dominant species. 23 species of Geometridae and 16 species of Crambidae were found in both collections. 60 individuals of Spilarctia seriatopunctata, which was the most dominant species, were collected.