An electronic instrument for which operating setting is possible according to operating signals transmitted from a plurality of kinds of remote operating devices of a differing operating signal structure, includes: an operating signal receiving section which receives the operating signals transmitted by the remote operating devices; an operating signal processing section which, when a specified operating signal based on a specified operating signal structure is input among the operating signals received by the operating signal receiving section, carries out a process control of the electronic instrument in accordance with the specified operating signal; and an operating signal conversion section which, being provided in a branch signal transmission system which diverges from a direct signal system, which directly transmits the operating signal from the operating signal receiving section to the operating signal processing section, converts an operating signal based on an operating signal structure which differs from the specified operating signal into the specified operating signal, wherein the operating signal conversion section transmits the converted operating signal to the operating signal processing section, whereon the operating signal processing section carries out an operating process in the electronic instrument based on the converted operating signal.