理想主義與現實主義之產生，乃源自於人們對國際社會本質看法的差異。理想主義的研究架構是規範性的，它建立在尊重法律、接受共同價值和發展國際組織的基礎上，其所注重的是「應然」（what ought to be），而不一定是「實然」（what it is）。現實主義館派則注重「實然」。現實主義與理想主義是每一個國家在制定外交政策或取行動時所思考的主要典則（paradigms），兩者並非全然互斥，且在不同的階段也能互補互惠。 中華民國外交政策自1989年以來，則修正以往「漢賊不兩立」的模式，以「務實外交」（即不挑戰中華人民共和國在國際上的地位）之政策參與國際社會，而我「務實外交」也因中共在國際上全力的打壓，使我國外交之拓展十分有限，這使得中華民國雖是國際法上的國家，但國際人格卻發生嚴重萎縮。我國外交障礙在中共，故要突破外交孤立，得先突破兩岸關係，以理想主義與現實主義調和的思考模式，要求兩岸先同意成立「大中華邦聯」形式上的統一，為短期目標，俟中共政治民主化之後再考慮做進一步的主權結合才是上策。

　　　　　The research on international relations is to maintaining peace, or get did of war, seek justice and increase common interest among nations. Idealism and realism are both rooted their attitude toward the nature of international society. And they are two main paradigms to be considered, whenever a country tried to make foreign policies or take action. Idealist point out that, international law, international organizations, morality and collective security are good ways to build a stable and peaceful world. On the contrary, realists state, "Balance of Power" is much more useful than the so-called "morality, international organizations and law. The world politics has undoubtedly entered a new era since the collapse of the Soviet empire in eastern Europe and the rapid decline of the Soviet Union. The New world Order replaced the old Bipolar Order. Shortly after the New World Order was built up, the ROC's constitutional reform in 1991 was also in progress. And the ROC adopted "pragmatic diplomacy" which would not challenge the PRC's status in any international organization and its official tied with other countries. With the opposition and obstraction of the PRC, the ROC again and again was refused get into the door of the United Nationa, even though the ROC have completely been a democratic, free market country and has won good reputation among nations. Undoubtedly, cross-strait relations had a close connection with ROC's entery into international society. The author thinks, "the Confederation of the Great China" is the best current choice for ROC'S mainland China Policy.