A visible ray communication system, comprising: a transmission apparatus including: a plurality of light emitting devices for emitting light of different colors; a serial-to-parallel convertor for serial-to-parallel converting serial transmission data into N parallel data signals and a control signal; a modulator for generating N modulation signals by modulating the N parallel data signals output from the serial-to-parallel convertor; a sine wave signal multiplier for generating N carrier signals by respectively multiplying the N modulation signals by N sine wave signals having an orthogonal carrier frequency; a carrier allocation unit for receiving the N carrier signals and the control signal, allocating the N carrier signals to the plurality of light emitting devices based on the control signal, adding carrier signals allocated to same light emitting devices, and generating a transmission signal for each of the plurality of light emitting devices; and a light emitting controller for controlling each of the plurality light emitting devices to emit light at a light emitting strength according to a signal amplitude of its respective transmission signal. a transmission apparatus including: a plurality of light emitting devices for emitting light of different colors; a serial-to-parallel convertor for serial-to-parallel converting serial transmission data into N parallel data signals and a control signal; a modulator for generating N modulation signals by modulating the N parallel data signals output from the serial-to-parallel convertor; a sine wave signal multiplier for generating N carrier signals by respectively multiplying the N modulation signals by N sine wave signals having an orthogonal carrier frequency; a carrier allocation unit for receiving the N carrier signals and the control signal, allocating the N carrier signals to the plurality of light emitting devices based on the control signal, adding carrier signals allocated to same light emitting devices, and generating a transmission signal for each of the plurality of light emitting devices; and a light emitting controller for controlling each of the plurality light emitting devices to emit light at a light emitting strength according to a signal amplitude of its respective transmission signal. a plurality of light emitting devices for emitting light of different colors; a serial-to-parallel convertor for serial-to-parallel converting serial transmission data into N parallel data signals and a control signal; a modulator for generating N modulation signals by modulating the N parallel data signals output from the serial-to-parallel convertor; a sine wave signal multiplier for generating N carrier signals by respectively multiplying the N modulation signals by N sine wave signals having an orthogonal carrier frequency; a carrier allocation unit for receiving the N carrier signals and the control signal, allocating the N carrier signals to the plurality of light emitting devices based on the control signal, adding carrier signals allocated to same light emitting devices, and generating a transmission signal for each of the plurality of light emitting devices; and a light emitting controller for controlling each of the plurality light emitting devices to emit light at a light emitting strength according to a signal amplitude of its respective transmission signal.