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A wind tunnel experiment was performed to estimate the wind forces of Ieodo Ocean Research Station. The structure portion above water surface was modelled with 1/80 scale ratio. The wind velocity in the wind tunnel was 8m/s. The numerical analysis of the wind tunnel test model was performed. The numerical analysis results and the wind tunnel test results on average wind force coefficients were compared to validate the accuracy of the numerical analysis. In the numerical analysis, the minimum thickness of finite elements and boundary conditions were considered as main analysis parameter. The minimum thickness of finite elements was decided to simulate boundary layer. Wall boundary condition is used on the structure and the ocean. On the far boundaries, symmetry boundary condition is used except velocity inlet and pressure outlet boundaries. The numerical analysis of the real sized model under the operating condition(30m/s wind velocity at the altitude of 10m) was performed and compared with wind tunnel test results.