本文运用运筹学理论、成组技术、计算机网络安全有关理论创建了计算机网络风险费效对策的两种优化模型 ,为抗攻击者提供了如何选择以最小的代价 ,减少风险 ,达到期望的抵抗攻击目的的工具。根据工具得到的最优决策对风险解决有重要作用。 This paper uses operational theory, group technology and computer network security theory to create two optimization models of computer network cost-effectiveness measures for anti-attacker to provide how to choose the least cost to reduce the risk to achieve the desired resistance to attack Purpose of the tool. Optimal decisions based on tools have an important role in risk resolution.