The attacks of Mongol tribes to the different territories of the world including China, Iran, northern parts of Caspian Sea, and Asia Minor destroyed many cities and slaughtered many people. After some time, Mongol's rulers started to rebuild and renovate the regions governed by them thanks to the application of appropriate bureaucracy, competent and qualified authorities, as well as experienced scientists, scholars, craftsmen, and artists. Due to the cooperation of prominent statesmen of the dynasty of Juvaini, Khajeh Nassir al-Din Tousi, and Khajeh Rashid al-Din Fazlollah Hamadani, a broad commercial relation was established politically and culturally between Iran and China. Moreover, such a new relation was established with the Europe and Christian countries, and more people from the West travelled to the East. Therefore, the western people, who had acquaintance with the East through the Islamic parts of Spain and the Crusades up to the time of Mongols' attack, could transfer the culture, and many advanced sciences of the East to the West, leading to a great change in the West, which is called renaissance. This research aims to answer what the role of Iranian statesmen is in the transfer of the culture of East to the West, as this transfer had great effects on the Europe along with other factors. For this purpose, descriptive-analytical method has been used.