Examined in this article is how and why members of the Gochang Seol House (高昌偰氏) and the Seochok Myeong House(西蜀明氏) immigrated to the Korean peninsula, and what was the meaning of their descendants’ activities in later Korean history. Both houses came to Goryeo, in the wake of extreme chaos caused by the Mongol Yuan presence in China pulling out, and the ensuing Han-based Ming dynasty’s replacement of the Imperial Yuan. Although they relocated themselves to Korea for different reasons, both were able to ultimately do so thanks to the close relationship Goryeo and the Yuan Empire had with each other.<BR> After coming to the Korean peninsula, both houses established themselves in such a new environment in their own ways. The Seol House had actually been a renowned Uighur household in the Yuan Empire, with a resident base in the Jiangnan region of China. Their such background enabled the House’s descendants to engage in diplomatic negotiations with Ming China. Meanwhile, the Myeong House, which had earlier ruled the region of Sichuan at the end of the Yuan imperial period, constituted a case in which an entire House was forcibly relocated to the Korean peninsula by no other than the Ming Emperor Hongmu himself. The Emperor asked Goryeo and later Joseon kings to treat them not as refugees but as ‘guests.’<BR> The Joseon elites regarded them based on their understanding of those Houses’ past reputation. The fact that members of the Seol House have engaged in Neo-Confucian studies and produced successful state-exam applicants for generations continued to be described in Joseon records. Meanwhile, later in the 18th century Joseon (when the Jung’hwa sentiment was amplified throughout the society) the Myeong House was heralded as a household that helped the late Goryeo government secure Chinese ritual attires and also facilitated the peninsula’s adoption of Chinese cultural elements. These recollections by the Joseon intellectuals in fact helped the descendants of these households to redefine their own identity as well.<BR> The immigration and subsequent activities of the Gochang Seol and Seochok Myeong Houses were indeed another form of struggles to establish themselves in an alien environment, but they also contributed to shaping Joseon’s relationship with Ming in the dynasty’s early days and later to encouraging the Joseon intelligentsia to deepen their Sino-centric perspectives. That may be the legacy left by the descendants of those two households.