The global financial crisis triggered by American subprime mortgage crisis results from the financial systems, led by Wall Street, of Europe and the United States which violate such three principles of financial industry as being rooted in industry and commerce, strict risk management and control, as well as moderate leverage rate. China’s financial industry should prevent such five trends as excessive overlapping policies, increasing enterprises’ financing cost, too much privileged consciousness, too high income and weak service consciousness. Crisis-prevention should use such four balances as the gross proportion of loan to GDP 1∶1, gross proportion of securities market value to GDP 1∶1, gross proportion of total real estate value to GDP 1∶1, and gross proportion of national sovereign debt plus social security expenditure to GDP 1∶1. Crisis solution should not only depend on self-circulation of financial industry but rely on scientific and technological progress and tangible economy development.