In the age of globalization, neoliberal developmentalism is hegemonic cherachtristic of the international system. In this age legitimacy of political systems depends on national development. In such a space, creating a constructive interaction between national and international levels is a must for sucsess in national development plans. Foreign policy is the main field & major means of creating the constructive interaction. My hypothesise is that a developmentalist foreign policy could support national development plans and strenght bases of political system legitimacy through constructive engagement with the world. In this paper nessesities and chalenges of a developmentalist foreign policy in Iran will be explained.