As the rapid development of Internet technology, the influence to the financial fields of the financial information on the Web has become increasingly can not be ignored. Facing mass unstructured Web text about financial information, the paper present a method to calculate the tendency of text, and analysis the relationship between the emotional tendencies of Web financial information and the financial crisis of listed companies qualitatively. Via empirical analysis, Financial Warning for listed companies by using of Web financial information is not only feasible, but also ahead of financial indicators more than 3-4 quarter.
