The Transformations of contending concepts of sovereignty have been originated from a transition of international political environment in the past few hundred years. Traditionally, a state is seen as a human community that successfully claims its legitimate sovereignty within a given territory. And a sovereign state contains populations, territory, jurisdiction and the capability of national defense. Nowadays, challenges come not just between territories but within territories as well, the more vigorously the state asserts its territorial integrity and identity, the more manifest is the challenge from within and without. This is simply because goods and information across their territories and interdependence among states are changing the nature of states. Forces that were seen valid for the protection of state's jurisdiction and territorial integrity have been regarded as invalid and even illegal. Using military force against its people or others, for whatever reasons, violates social contract by treating people as a mere object. Which obviously destroys the relationship between rulers and ruled and undermines the legitimacy of the administrator and the society as well. An international intervention may thus be incurred. As for Taiwan (ROC), its connection with Mainland China nowadays has nothing to do with sovereignty itself ever since their separation in 1949. However, the major driving force, the myth of imagined communities, has become the only excuse for PRC's military invasion into Taiwan. In so doing, a war that is to be claimed as keeping territorial integrity for China will turn out to be a solemn war for Taiwan's independence.