The utility model discloses a wireless EV-DO audio and video conferencing system, which solves the problem that the personnel out on business need to exchange the information with and consult the supervisor or other working groups for site conditions. The wireless EV-DO audio and video conferencing system comprises a supervisor end and a working group end, wherein the working group end comprises a wireless EV-DO audio and video transmitter, a group of audio input and output devices and at least one camera, the wireless EV-DO audio and video transmitter comprises a power supply module, an audio input module, an audio output module, a video input module, a wireless communication module and a main control module, the supervisor end comprise a host, a video display device and an audio input and output device, the host is connected with an EV-DO audio and video conferencing server, and the EV-DO audio and video conferencing server is in communication connection with the EV-DO wireless audio and video transmitter of the working group end through an Internet 3G/2G mobile communication network. The utility model can rapidly realize the information exchange of the personnel out on business and the headquarters or other working groups for the site conditions, and has the advantages of large amount of communicated and transmitted information and high speed. Moreover, the working group end can be conveniently carried about and can also be easily operated.