The Lucid technology as an interactive fully illustrated identification tool, has developed and assisted in the diagnosis of agricultural and quarantine pests and invasive organisms over the past years. In this study, lepidopterans specifically relating to quarantine pests were selected for a lucid key development based on the border inspection data from 1996 to 2016 in South Korea. They belong to four families: Sphingidae, Noctuidae, Pyralidae and Crambidae, and also categorize into the three groups: regulated, potential regulated and non-quarantine pests. The key includes diagnostic characters from head, thorax, fore- and hind-wings for each species examined.