<正>EU security policies consist of two aspects. Internally, they involve behaviors among European states. Externally, they refer to EU policies towards other countries and regions. I. EU's internal security policies. Europe's integration has impact on EU's internal security policies. Today, it is impossible to have war or face military threats among EU members. After suffering countless wars, this achievement is by no means easy. The reason for this achievement is that we believe if traditional nation states can open their borders, conduct cooperation, and render part of their sovereign rights to an integration institution, they will coexist even more peacefully. In the past half a century, the internal security policies of the EU have worked, ensuring that Europe has not witnessed military conflicts any more.