This paper discusses the economic development in Taiwan during the post-war period. We examine the economic growth, equity, stability of Taiwan and her structural changes since 1950. Then we analyze the factors that determines the growth or the recess of Taiwan's economics. Our review of various aspects of the post-war economic development in the Island leads to the same conclusion known by experts, namely the growth rates used to be one of the highest in the world, the income was equally distributed, and economic fluctuations did not interrupt economic growth in a long time. We also observe that Taiwan's economy is transformed from agriculture to industry in the 1960s, and to the service industry in the late-1980s. compared to other countries in the same region, one finds two factors favoring Taiwan's economic development: the first one is the infrastructure of capitalism built by Japanese colonial government, while the other one is the open economy strategy adopted by the Nationalist government. There are also two factors endangering economic development: the first is the introduction of the so-called KMT-State capitalism before 2000, while the second one is a too closed economic relationships with Mainland China. To speed up economic development internationalizing Taiwan's service industry is perhaps the only way Taiwan has to adopt in order to become a member of the developed countries.