Beginning with the analysis of the computer security and security auditing problems in brief, this paper integrates them with the network systems, and attempts to make a thorough study on the security and security auditing technique of the computer network; 通过对计算机安全和安全审计问题的简要分析,并结合网络系统的特点,力图较系统深入地探讨计算机网络安全及其审计技术;