an apparatus for remotely controlling audio / video devices from different manufacturers . first code signals are directly input to the remote controller apparatus when it is in a learning mode by way of a cable or an infrared light - emitting unit from a peripheral audio / video device . the first code signals are stored in specified locations of a conversion table in the lookup table memory . second code signals are input to the remote controller apparatus when it is in a conversion mode from another audio / video apparatus by way of a cable or an infrared light - emitting unit . the second code signals represent command control functions . the conversion of the second code signals to third control signals is accomplished by a microprocessor using the conversion table containing the first code signals . the third code signals are output from the remote controller apparatus to control a peripheral audio / video device . also , there is disclosed an audio / video combination system using the remote controller apparatus .