France is one of the European countries with the highest amount and proportion of Muslim immigrations. However，for various reasons，the Muslim immigrants have great difficulties in integrating into the French society. Isolated from the mainstream groups and fallen into the bottom of the society，the Muslim population have been engaged in continuing conflicts and tensions with the mainstream society. The tensions，when reaching a certain level，has inevitably broken out，and that’s the very reason for the Charlie Hebdo Event and the terrorist attack in Paris. The French government has carried out a lot of policies in order to deal with the immigration issue，however，due to the series of complicated factors that affect this issue both at home and abroad，a complete integration of the Muslims into the French society is no easy task. Common and long-lasting efforts are needed from both the host country and the Muslim immigrants to promote further inclusion of the latter into the mainstream society and to eliminate the roots of terrorism.