There is an increasing demand for economically viable systems by reducing maintenance costs and operation-down time in the large number of offshore wind farms and larger systems. Currently, the system that supports the operation and maintenance (O&M) of offshore wind turbine systems installed in the far sea not only captures less data but also has difficulty monitoring arbitrary failure or extreme environments. In this paper, we propose a monitoring and visualization system for O&M by reusing design data and environmental data to construct a digital twin framework. We can verify that the system can be monitored in real time even in arbitrary situations by connecting CPS systems
and virtual environments created by Multi-body dynamics and Hydrodynamics using a physics engine.