Kocak,A.O. & M.Kemal, 2014, Lepidoptera of Iran based upon the Info-system of the Cesa. Priamus Suppl. 31: 1-487. This study is a part of the Cesa project entitled Lepidoptera Asia. Previous related publications of the project are briefly explained. Outlines of working programs and studying conditions are discussed. Faunistically, 3925 species of 1449 genera in 57 families are listed synonymously for the first time. Among them, 420 species belong to the butterfly families, and 3505 species to the moths. Rich distributional information for each taxa in Iran and also in abroad are mentioned as codes. Original references are also added to some taxa. As a separate informative and complementary list of the 1240 subspecies known in Iran is also given. For 57 families brief, and full annotated bibliographically as 1534 items are evaluated and mentioned. Selected provincial lists of the species are added. Together with their species numbers recorded, these provinces are as follows; Eastern Azerbaijan Province (234), Western Azerbaijan Province (468), Fars Province (1164), Kerman Province (244), Khorasan Province (554), Kurdistan Province (255), Mazandaran Province (645), Sistan-Beluchistan Province (596), Tehran Province (925), and Zanjan Province (136).