PURPOSE: A home network system is provided to control network traffic by delaying transmission of a message. CONSTITUTION: A home network(1) and a client device(4) are connected to an LnCP(Living network Control Protocol) server(3) through the Internet(2). The LnCP server(3) receives a monitoring and control command from the client device(4) and transmits a corresponding message of a certain form to the home network system(1) through the Internet(2). In addition, the LnCP server(3) receives a certain form of message from the home network system(1), and stores it or transmits it to the client server(4). A home gateway(10) performs a function of connection with the Internet(2). Network managers(20-23) perform a function of setting and managing an environment of electric devices(40-49). LnCP routers(30,31) are provided to connect transmission media. LnCP adapters(35,36) allow the network manager(22) and the electric device(46) to be connected with the transmission media. The home network system(1) includes a plurality of electric devices(40-49). The first electric device receives power, generates a certain message, and sends the message to the second electric device after a certain delay time.