Christianity (Catholicism) entered China thirdly in Ming—Qing transitional period. The disseminator was chiefly Jesuit Missionary . They take messure suiting China Culture in order to take root and popularize Catholicism in China . Catholicism caused many echoes among social stratums. The different attitudes lied in the lower persons, gentry and the highest ruler ----emperors . This text mainly studies emperors’ attitudes towards Catholicism and influences which their attitudes caused . Emperors’ attitudes mainly include absorbing western technique Jesuit Missionary carried and forbidding them missionize in China. The attitude of only absorbing western technique make it possible to exchange culture between China and the West. But skeptical attitude to Catholicism broke off cultural exchange between China and the West.