The political relationship between Taiwan(ROC) and China(PROC) is unstable. Act Governing Relations Between The People Of The Taiwan Area And The Mainland Area(兩岸人民關係條例) legistimized the relation but still left problems with its obscurity in legal phrases and legal levels. Instead monism and dualism discussed in the realm of Public International Law, the essay offers an alternative solution to the relation between Taiwan and China. Kelsen’s concept of authorization helps us to make clear relations of different legal regulations, especially their structure level. There is no need to concern whether Taiwan is a State or not, but to link the validity chain between the legal regulations. The essay also mentions that Hart provided a promionant concept of rule of recognition, with which we can explain the relations among states and international society appropriately. The essay holds, theories of two scholars take the question of Taiwan and Mainland China to the same answer, that argreements of Taiwan and China are binding, though we still need to evaluate the texts to ensure their binding forces.