Literature has been special for the Polish who suffered from the numerous invasions from surrounding countries for her geographical location at the center of Europe. In the late 18th century at a time when Poland was divided and ruled by Russia, Prussia and Austria, literature played an important role in uniting Poland. During the 2nd world war in which Poland was occupied by the Soviet Union and by Germany, and during the Cold War period under socialism system(1948~1989), the Polish literature was in the front to keep unique national culture with overseas migration community at the center. The Polish Diaspora literature from 19th century up to now has naturally embodied national sufferings from foreign powers in their literary tradition linked to the problem of ``migration``. In addition, they belong to other cultural sphere, but keep their own unique identity, which is similar to Korean Diaspora literature to a great degree. In this article specific texts (two novels) are analyzed before and after system transition in 1989. * Before system transition: Witod. Gombrowicz, Trans-Atlantyk (1953) * After system transition: Krzysztof Maria Załuski, Szpital Polonia (1999) Gombrowicz had himself migration experiences with high achievement and recognition in literature not only in Poland but also in the world. Załuski, who belongs to new generation, stayed in Germany from 1989, a year in which Poland experienced system transition, to 2004 to describe the change of Polonia in Germany. In their works, hardships as ``strangers`` in foreign countries, emotional wandering and agony, nostalgia to lost home land and exploration of identity were described vividly. This study, by comparing the 2 literature texts, attempts to trace the change of Diaspora consciousness which Polish migrants experienced in foreign countries with different political system like socialism and capitalism.