(An information brittleness risk assessment model of network communication system based on brittle risk entropy is proposed. The brittle risk entropy is a measure of the brittle risk of a communication system at a certain time, that is, a measure of the possible uncertainty of collapse, and reflects the ability to conjecture and grasp the brittle risk of the system as a whole. Based on the brittle risk entropy, an information brittleness assessment system is built, and the fuzzy reasoning method is used to connect the experience of experts.)