There is a great challenge to deal with psychid taxonomy due to the sexual dimorphism and conservative morphology of male. The genus Eumeta is widely distributed among Asia, Australia and Africa, with taxa resembling each other in morphological aspects. This historical confusion was originated from misidentification of type specimen and difficulty of specimen vouchering. Previous studies also recorded Eumeta of Taiwan, but taxa still uncertain actually. In present study, reared specimens were used to acquire morphology of different development and larval case style, and corroborated each other with barcode of life. As the results, Eumeta minuscula and E. variegata were confirmed in Taiwan. A highly variation of male morphology with genitalia asymmetry were described. Additionally, the male 8th tergite and sternite were suggested valuable for species identification. Having examined the type series specimen and original description, 13 species distributed in orient were grouping. Except E. minuscula and E. crameri were smaller and identifiable, a mass of ambiguous species included E. variegata, E. maxima, E. layardi, E. japonica, E. pryeri, E. sikkima, E. wallacei, E. javanica, E. wallacei var. bougainvillea, E. formosicola and E. kiushiuana were defined as E. variegata species-complex, and then revised this complex mainly with Taiwanese specimens. Due to the morphological variety of whole examination involving with those of Taiwan, 8 species were treated as junior synonym of E. variegata, excluding E. japonica, E. javanica and E. kiushiuana that remain undetermined because the types have not examined. Preliminary result of molecular work also supported this treatment as well, except an individual of China (Yunnan) that more information is needed.