The Constitution of the Republic of China was made in Nanking, China in 1946 and brought to Taiwan by the Kuomintang Government soon thereafter. In this essay, the author argues on the basis of his knowledge and other scholars' views that it is necessary for Taiwan to make a new constitution. First of all, the drafting process lacked the participation of Taiwan, and the Constitution's territory does not include Taiwan. Therefore, its implementation in Taiwan lacks legitimacy and creates many constitutional problems. There are also many fundamental flaws and contradictions in the design of the governmental system. The Temporary Provisions during the Period of Mobilization against Communist Rebellion and seven rounds of amendments so far have not been able to rectify these problems nor establish a normal constitutional order in Taiwan as a sovereign country. Furthermore, the Constitution imperils Taiwan's national security and hampers Taiwan's international status. For these reasons, it is necessary to make a new constitution of Taiwan, for Taiwan, and by the people of Taiwan.