In the paper, it has been intended to study USA policy to nationalization of the Iranian oil industry and neuclear energy comparatively. The question of the study is as: does USA policy to nationalization of the Iranian oil industry have been the same or not? As explained in the paper, USA policy in the field has been moving from a somewhat active state to an active and thorough state of opposition. The paper, studying USA policy during the period including the two cases, studies the measures of USA states involved in the cases. The base of study lies in paying attention to resemblances and distinctions of social phenomena and political thoughts. The conclusion of the study may be useful in measures made by offices of IRI foreign policy and in their manner of measuring in performing Barjam.