一個國家在政治、經濟與社會各個方面的發展，往往對該國的外交造成重大的影 響。近幾十年來，臺海兩岸皆積極的爭取各國的認同與邦交，然而，伴隨著中共政府的強大 ，及其在國際上的刻意地打壓與排擠之下，對於我國之外交關係造成的極大的挫折。為突破 這外交上的困境，近幾弗來，我國政府在外策上改變政策，以本國的經濟成長與民主政治的 力量為後盾，實踐「實質外交」，該策略之運用，對於我國之外交關係影響頗大。

　　　　　Domestic developments are often interlocked with the international relationship of the nations involved. The Republic of China on Taiwan that has been important subject of study for her role in international politics in the Pacific region for many years, has undergone a drastic internal transformation for the past four decades. The rapid economic provided the base of the political democratization which in turn created the demand of autonomy in international politics. It is the intention of this paper to trace the domestic developments and its foreign policies of the Republic in order to provide a better understanding of Taiwan's role in the cross-Taiwan straits relations and its impact on the international community.