Method for expanding function of conference system and conference system with expandable function

The invention provides a conference system and a function expansion method thereof. The method comprises the following steps: providing a first circuit board and a second circuit board which are arranged in a receiving device; receiving the first wireless packet transmitted by the first transmission device only through a second communication module in the second circuit board; a second processor in the second circuit board controls a second communication module to execute an unpacking program on the first wireless packet so as to obtain first compressed audio-video data; and a second processor in the second circuit board generates an instruction signal, so that a first processor in the first circuit board receives the first compressed audio-video data through the data channel, and decodes the first compressed audio-video data, so that the first processor obtains the first audio-video content of the first transmission device. 本发明提供一种会议系统及其扩充功能方法包含：提供设置于接收装置内的第一电路板及第二电路板；仅通过第二电路板中的第二通讯模组接收由第一传送装置传来的第一无线封包；第二电路板