The invention provides an audio adapter device of a radio station and an adaptation method thereof. The audio adapter device comprises an adapter terminal and a radio station, wherein the adapter terminal comprises a first modem device connected with a signal, a control switch connected with the first modem device, and a voice interface connected with the control switch, the control switch is connected with audio, the radio station comprises an audio interface wirelessly connected with the voice interface, and a second modem device connected with the audio interface, the first modem device comprises a first modulation device and a first demodulation device, the second modem device comprises a second modulation device and a second demodulation device, the signal is modulated by the first modulation device and then is sent to the second demodulation device to demodulate, and the signal is modulated by the second modulation device and then is sent to the first demodulation device to demodulate. The audio adapter device can be adapted to user characteristics and environments, realizes sequential wireless communication, and has higher adaptation accuracy compared with prior art.