The Application Research of Open Platform for Security Shi Cuixia (Information Engineering College of Capital Normal University, 100037) 【Abstract】 This paper discusses the inter-operation of network security products and introduces Open Platform for security(OPSEC). Through OPSEC, Network Security Monitor System can work with other security products, such as firewall. And this will make network more secure. 【Key words】Network Monitor; Open Platform for Security, Network Security