With the rapid development of Chinese information technology, information security becomes more and more important, the information level of security protection, risk assessment and security check as an important means of information security in China. Through the accumulation of years of information security evaluation experience, we combined with the risk assessment of the financial industry and the State Administration of Taxation of the national network system, grade protection evaluation and security check of three integrated work experience presented in the triple integration of information systems Information Security Information Security Evaluation, which operability and guidance based on fuzzy comprehensive evaluation methodology. Then we get fuzzy evaluation information security model.