To resolve the problem that there are inconveniences of production and inventory control because of production of every kind of classified remote control devices due to classification for the devices depending hardware in the case of connections of plural cable remote control devices used for a hot-water supply system and the like, and resolve the problem that failures of mounting the plural devices occur even when setting the system.

In a connection between a body of the system and the plural devices, at a cable interactive communication means, a slave set has a confirmation means for the devices and a decision terminating means for the devices, classification for plural of the devices can be allowed by a single kind of the devices.