Critical Security Studies (CSS) is a new perspective or approach in the Security Studies, its concept of security is different from other perspectives. CSS claims that security is emancipation, only the emancipation can bring the real security. CSS also argues that security is what we make it. Therefore, CSS is a constructivism which to explore the role of human consciousness in the international relations, and national collective identity and interests. Based on the perspective of the CSS, this essay analysis the security situation in Taiwan Strait and make some recommendations for the millennium to come.