In the information age，cyber security attracts tremendous attention and is of great significance. Thus Canadian government has published Canada’s Cyber Security Strategy which is built on three pillars：securing government systems，partnering to secure vital cyber systems outside the federal government and helping Canadians to be secure online. This is for securing the national and public security，improving government’s credibility and prestige，for ensuring the safety of domestic and overseas economic activity，boosting economic development，for cooperating with international cyber security，promoting international status. However，fund deficiency，weak implementation of government departments and inadequate international cooperation，poor autonomy confine the role of Canada’s Cyber Security Strategy.