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According to the fact that the sites of wired video monitoring system cannot move, wiring is not flexible and high network bandwidth is required to transmit video data stream. H.264 video compression standard is adopted, WiFi is introduced as the wireless transmission network, and video coding and compression are produced on embedded S3C6410-based platform, which makes compressed data streams transmitted via WiFi. Based on the above, a wireless video monitoring system is built. It is proved that the site amount of the monitoring system could be increased or decreased in demand and moved arbitrarily through the experiment. Monitor image is clear and stable, and the system could be actually applied in petroleum exploitation, geological exploration, and so on.