SNMP is convenient for complicated network management, which is able to standardize network management. The network management of digital television is based on SNMP. The agent is built on the ARM9 platform of digital television front-end equipment. All the digital televisions are managed by the same platform, which is easy for user management. NET-SNMP is an open source software package. For the sake of code migration and agent extension, NET-SNMP is selected to research and develop the embedded network management system. This article chose NET-SNMP to build agent on ARM9 and realized the running of agent, which laid a solid foundation for monitoring the running of digital television.