An implementation scheme for security system in intelligent residential district is presented in this paper. The security system is composed of home security subsystem, access control system and residential security control network. Hardware and software architecture of the home subsystem and design of the control network are introduced in detail. Problems of wired networks are solved due to the application of ZigBee technology in home subsystem. An interactive management system is designed for centralized management of residential district security, and it makes the security system more efficient and people-oriented.