The “doctrine of Mahdism” is one of the fundamental and basic discussions in 
Islam from which deep humane and Islamic acts can be derived. With the 
realization of the Islamic Revolution which is based on the Shiite school, there 
is this question that what the role and position of the fundamental doctrine of 
Mahdism is in the Islamic Republic’s foreign policy. The foreign policy in 
Islamic Republic of Iran has rules that have benefitted from the pure Islamic 
principles specially the Mahdism Doctrine considering the international laws. 
In this descriptive-analytic article, the roles of Mahdism doctrine will be 
explained in foreign and international policy such as the rejection of hegemony 
and domination and the defense of the weak and the like with regard to its 
intellectual principles, i.e. the Qur'anic verses, the thought of its leader and the 
constitution.