Abstract: We devise a 3G wireless video monitoring system applicable to largescale unattended ocean data buoy. It employs a duty circuit to control power consumption of the wireless video transmission module, so its power consumption is reduced. We also design waterproof technology for an ordinary camera, which can endure harsh ocean environment. It has been installed in a business operation buoy. Recent twoyear video data show that its monitoring effect is better, and that it can effectively find such issues as buoy safety and marine pollution.

Key words: 3G wireless video system, monitoring, buoy