The study addressed the most important phases of Turkish foreign policy since the establishment of the modern Turkish republic in 1923. And the principles govering it. Then it focused on the new trends of foreign policy after the Jastice and development Islamic rooted party came to power in Turkey 2002. Especially the strategic depth, reset problems or zero problems with neighbors and new ottomanism. The study concluded that the basic tenets which guided turkey's foreign policy since the founding of the republic included caution and pragmatism.