This paper aims to highlight the linkage between domestic public policy and international bargaining power in the realm of science and technology policy. To do so, it constructs a model hybrid of two independent theoretical frameworks: Advocacy Coalition Framework by Paul Sabatier and Double Edged Diplomacy by Peter Evans. The main question to answer is how policy learning at the national level can occur as a result of the factor of enlightenment according to the Advocacy Coalition Framework and the second question is how this learning stretches to the foreign policy sub-system and invigorates the capacity of negotiating team for providing more innovative package of technical instruments or the so-called “win-set”, according to the Double Edged Diplomacy. This hybrid model is applied to the case of nuclear policy/ diplomacy of Iran. Thus, the objective of the paper is twofold: first, it takes on an analysis of the domestic nuclear policy change or readjustment in Iran that has been produced by policy learning. The second objective is to explain how this domestic learning factor overflowed to the foreign policy sub-systems and has provided the country with a new approach to the nuclear negotiations with foreign partners.