The present invention discloses a ring downloading based on infrared ray communication and converting apparatus and method for mobile communication terminal. The apparatus includes: an infrared data receiving part for receiving audio data from computer through infrared ray (IrDA); a ring format converting part for converting the audio data received by the infrared receiving part to ring format supported by corresponding terminal; a memory for storing the audio data after format conversion by the ring format converting part; a key input part provided for user to input the command relative to the audio data download and ring setting; a display part for outputting the menu and corresponding command running picture required by the user for inputting the command; and a central processing device for controlling the component element and processing the user's command. The apparatus can make the terminal user directly select, edit the ring belonging to him and other people do not have.