The effective internal control of a corporation is closely linked to the financial information of high quality .It provides much for society . Besides , it should be considered as its social responsibility that a modern corporation should take . However ,nowadays many corporations lack internal control so that the financial information it offers is of low quality . In the paper,the author analyses the relationship between internal control and the quality of financial information and also gives us some of his own thoughts about how to improve the quality of financial information and strengthen the internal control in a corporation .