To provide an electric appliance network system which achieves the simplification of work and the reduction of time required for registration processing of a controller and target devices by completing a shift to a registration mode at once at a controller side and performing setting processing of each of devices in the order of shifting to the registration mode.

Regarding the shift of a controller device 1 to a registration mode, while shifting to a second communication condition determined in the case of registration, the storage of a requested registration of a network correspondence device to be added, the acquisition of information about the relevant device and setting of the relevant device are carried out as occasion demands, such that it is enough for a user to perform shift operation only once. Regarding air conditioners 9a-9c and human sensible sensors 15a-15d or the like as network devices, setting processing of device names is executed in the order of shifting to the registration mode, such that it is not necessary for the user to care of identification codes of the devices and registration processing is simplified.

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