The present disclosure provides a method, apparatus and a system of synchronizing audio with video. A receiving device receives a video signal embedded with a video sync signal and an audio signal embedded with an audio sync signal provided by a sending device; searches for the video sync signal in the video signal, searches for the audio sync signal in the audio signal; and processes the video signal and the audio signal according to a time when the video sync signal occurs in the video signal and a time when the audio sync signal occurs in the audio signal to make the processed audio signal synchronized with the processed video signal during playback.