A network system comprising: a first component having a first device code and configured for performing a predetermined function; and a second component having a second device code and configured for exchanging information with the first component on a communication connection, wherein if one of the first and second components (100, 200) receives a command for the communication connection, the one of the first and second components is configured to generate (100, 200) a connection sequence, the one of the first and second components (100, 200) is configured to exchange communication addresses and device codes with the other one of the first and second components (100, 200), and characterised in that, if the information is not exchanged between the first component and the second component during a predetermined time, at least one of the first component and the second component are configured to be switched to a communication connection standby mode, wherein if a command for operating the first component is input through the first or second component (100, 200), the network system is configured to communicate information between the first and second components (100, 200), wherein the information transmitted between the first and second components (100, 200) comprises: an auto signal automatically transmitted from one of the first and second components (100, 200) after communication connection is established between the first and second components (100, 200); and a synchronization signal generated from the other of the first and second components (100, 200) and corresponding to the auto signal, wherein the auto signal comprises power information regarding power or energy supplied from a power supplier, and having first time information, and the synchronization signal comprises a time synchronization signal for synchronizing second time information of the other component with the first time information. a first component having a first device code and configured for performing a predetermined function; and a second component having a second device code and configured for exchanging information with the first component on a communication connection, wherein if one of the first and second components (100, 200) receives a command for the communication connection, the one of the first and second components is configured to generate (100, 200) a connection sequence, the one of the first and second components (100, 200) is configured to exchange communication addresses and device codes with the other one of the first and second components (100, 200), and characterised in that, if the information is not exchanged between the first component and the second component during a predetermined time, at least one of the first component and the second component are configured to be switched to a communication connection standby mode, wherein if a command for operating the first component is input through the first or second component (100, 200), the network system is configured to communicate information between the first and second components (100, 200), wherein the information transmitted between the first and second components (100, 200) comprises: an auto signal automatically transmitted from one of the first and second components (100, 200) after communication connection is established between the first and second components (100, 200); and a synchronization signal generated from the other of the first and second components (100, 200) and corresponding to the auto signal, an auto signal automatically transmitted from one of the first and second components (100, 200) after communication connection is established between the first and second components (100, 200); and a synchronization signal generated from the other of the first and second components (100, 200) and corresponding to the auto signal, wherein the auto signal comprises power information regarding power or energy supplied from a power supplier, and having first time information, and the synchronization signal comprises a time synchronization signal for synchronizing second time information of the other component with the first time information.