The Irish neutrality policy was originated from the "Anglo-Irish Treaty," implemented during the World War II. Since then, the value system of Irish neutrality has been existed between its government and the people. This paper attempts to interpret the fundamentals of Irish neutrality policy based on international relations theory. At the end, the author concludes constructing Taiwan as a "neutrality state" based on the slogan of "yi-zhong-zheng-ce," rather than the conception of "one China policy" between the CCP and the KMT.