Abstract：The construction of ports is farther and farther away from land and goes deeper and deeper in water depth at
present. Monitoring of offshore structures in deep -waters is interfered by the coverage of signal network, bad weather，
construction and other factors. The data are unable to collect real-time and easy. This paper presents a new automatic
monitoring method which includes monitoring sensors， automatic acquisition system， underwater wireless transmission
system and data processing system. Practices proved that this method can reliably obtain real-time monitoring data of deepwater
offshore structures，providing reference for similar projects.