The Great Britain and France had cooperated to build European security more efficiently from the early 1900`s to outbreak of the World War II. However, The Great Britain supported the Atlantic Alliance formed in 1949 by the NATO which the United States lead. France acted independently of other European countries under the DeGaule`s rule from 1958. In the early 60`s, DeGaule decided to pull out of NATO military structure and the French government took a different military strategy in Europe comparing with that of the British government. And France supported to build the European security system under the European Union not under the NATO. The Common Foreign and Security Policy(CFSP) could not be formed sufficiently under the treaty of Maastricht signed in 1992 because of the two countries` struggle on the question of European security. However, England and France promised to cooperate to build the European security more efficiently at the Anglo-French summit held at Saint- Malo in 1998. Thanks to the Saint-Malo Declaration, the EU could construct the European Security and Defence Policy(ESDP) in the frame of the community. And more over, two countries could cooperate for the European security in many ways through the announcement of France`s return to the NATO military command structure in April 2009 and the ``Declaration on Defence and Security Cooperation`` between England and France signed in November 2010. This research analysed that France and England would cooperate more tightly than ever in the future, even if they disagree on some parts for building European security efficiently because of their traditional different positions. This kind of cooperation between two countries will also help European integration under the EU.