In recent years, cloud computing technology has developed rapidly, and various cloud services have gradually entered social life. Cloud computing has been widely applied, and virtualization technology, as the basic technology of cloud computing, has received more and more attention to its own security. Virtualization security directly affects the reliability of cloud platforms. More and more experts and scholars are investing in research on virtualization security. Cloud monitoring is one of the important technologies in the field of cloud security. The emergence of virtualization technology has changed the architecture of traditional computer systems. Due to its convenience, efficiency, and isolation, more and more computing systems are gradually moving toward virtual computing environments. Previous security monitoring systems ran in stable computing and network environments, while virtualization technology has changed traditional computing environments. The operating system is no longer directly located on the hardware layer, and multiple operating systems can run on the same hardware platform, with different services running on each system. The emergence of virtualization technology has brought challenges to security monitoring. This article mainly focuses on the design of a digital network security monitoring system for server virtualization hosts. It first summarizes the relevant research, proposes relevant application methods, and discusses the results of the research. I hope to bring some inspiration to relevant researchers and provide assistance for the development of related fields.