Canada is one of the countries in which the Act of Open Information has been enacted. The Canadian people have a right, according to law, to ask for their government to open public policy information to them. Canadians, actually, have had their long and hard stories in struggling for opening information, but now Canada has become advanced in opening information in the world from a typically conservative and conventional country. The case is not only helpful for us to understand Canadian changes in government policies, public opinion and media when formulating the Act, but also very useful for our reference when we are to set up a Chinese system of opening information.