An intelligent playback system, comprising: a wearable device, a main unit and a playback unit, wherein, the wearable device is configured to generate an audio instruction signal in the case of action of a user and send the audio instruction signal to the main unit; the main unit is configured to process an audio signal on the basis of the audio instruction signal, generate a playback signal, and send the playback signal to the playback unit; and the playback unit is configured to play the playback signal. The control of the audio processing device can be achieved, and hence the real-time interaction between the wearable device and the audio processing device can be achieved. And a wearable device and a main unit are also provided.