The development of sycamore lace bug, Corythucha ciliata, had been studied at four constant temperature levels of 15, 20, 25, and 30℃. And characteristics of its oviposition were studied at field. Developmental periods of eggs were 39.1, 17.1, 9.8, and 8.0 days, those of nymphs were 58.5, 23.8, 14.5, and 10.8 days, hatchabilities of eggs were 42.0, 78.5, 83.3, and 78.7%, and survival rates of nymphs were 14.7. 60.5, 75.7, and 48.9% at different temperatures of 15, 20, 25, and 30℃. Lower development threshold temperature and the effective accumulative temperature above the threshold required to complete development from egg to nymph were 11.5℃ and 344.8 degree days, respectively. The optimum temperature was estimated to be 25℃ for developments of egg and nymph. The longevities of adults were 41.0 days and 37.0 days for female and male, respectively.