Oil and gas in the contemporary history of Iran, synchronically, are the nostalgic / dramatic phenomena. It seems that the incomes of selling oil andgas are useful for development, but it has not been occurred. The survey of the history of Iran's foreign relations shows that the energy has caused Iran to an attracted attention country and converts to an international state. Foreign policy is based on four main factors: understanding international environment, preparing a strategy for protecting national interests, devising a tactical plan for the implementation of the strategy, and diplomacy, or organizing diplomats for the implementation of the tactics. Designing and implementing foreign policy is dependent on the internal situation, external pressures, statesmen's perception from other countries foreign policy, understanding global events, decision-maker's perception from international arena, and efficient diplomacy. If the above factors are missing, we can only talk of foreign relations, rather than a foreign policy. Rent is an economic word that means in political economy: income without any inconvenience.Now, Iran, has many engagement and contention with its neighbors: Caspian Sea, Parsejonoobi / Qatar, and Peace pipeline (Iran, India, and Pakistan).The authors, in this paper, try to answer a main question: Do the rentire state can use the rent factor to appointing and defining of rules of behaviors in foreign policy with neighbors? It seems, in our opinions, that the energy factor is a catalyst parameter for the converting foreign policy to foreign relations in rentire states.