A remote control unit according to the present invention includes a display unit for displaying a function item select picture where devices to be remotely controlled which are a plurality of function items such as “lighting”, “air conditioning”, “TV” and so on are arranged, a function item select switch for selecting any one of the devices to be remotely controlled, for example, “air conditioning” in said function item select picture, an affirmation button for deciding said selected device to be remotely controlled, for example, “air conditioning”, a denial button for canceling said selected function item, a control unit for allowing another function item select picture where a plurality of set functions which are a plurality of other function items such as “on/off”, “temp.”, “timer” and so on are arranged to be displayed on the display unit when, for example, “air conditioning” is decided and instructed by said affirmation button, to output an instruction code of, for example, “air conditioning” as decided and instructed, and communication section for converting said outputted instruction code into an infrared ray signal to transmit the infrared ray signal to a device to be remotely controlled, for example, “air conditioning”. As a result, the number of the operating switches and buttons can be reduced, the operation procedure of various devices to be remotely controlled can be unified, thereby being capable of obtaining high operability.