(Regarding the special use of intelligent security protection system, a new network security situation guessing algorithm is proposed, which takes the gray GM(1, 1) as the prototype and the Markov chain as the error correction. First, quantitatively model the network security situation, and fit the network security situation conjecture curve through the GM(1,1) conjecture model. Then, the Markov offset probability matrix is ??constructed by comparing the real value curve and the guess curve, and the uniform offset percentage is obtained.)