The invention discloses a safe and controllable smart network system based on self service and a constructing method. The system comprises a network system client (WAN) and a server terminal (LAN); the network system client comprises a plurality of protected devices; the protected device is a smart self-service terminal, each protected device is configured with a terminal management computer connected with the protected device; all terminal management computes are accessed into the network; the network is the local area network or the Internet; when the network is the local area network, a server contained in the server terminal is directly connected to the local area network; when the network is the Internet, the server contained by the server terminal is accessed into the Internet; the smart network system further comprises a transportation system and a payment system. The safe and controllable smart network system based on self service is capable of effectively guaranteeing the network information security, and provides a solid foundation for realizing the self service by the user based on the network.