This study examines the construction of spar-type floating offshore wind turbines in response to the rising demand for renewable energy. There are concerns about the influence of waves, wind, and currents on the process, particularly while positioning the tower, which is suspended from a crane barge, onto the spar-type floating structure. To determine the feasibility of such work and to analyze the operation feasibility, it is crucial to understand the motions of the floating structures and barge under the interacting conditions. In this study, a wave tank experiment was conducted to simulate the installation process of a wind turbine from a crane barge onto a spar-type floating structure not only under waves but also wind and current conditions. Additionally, the analysis software of OrcaFlex was employed to simulate the dynamic behavior of the floating structure, demonstrating that the dynamic characteristics observed in the experiments could be qualitatively reproduced.