The invention discloses a large-scale power enterprise salary security system. In the security system construction of the salary system, the system physical security, the network security, the host security and like aspects are planned in a unified way since the salary system is in the core business network of the enterprise. Except the external environment, various aspects are constructed according to the system related to the security system, and the perfect structure design is performed on the data acquisition flow, the permission control and like aspects in the system construction system besides the adoption of the advanced encryption and authentication technology on the technology, thereby guaranteeing the safety auditing on the internal access and external access by the system.