The integrated utilization of renewable energy has become a new research highlight in the field of marine engineering. Among these, the combined utilization of offshore wind turbine and wave energy device is particularly representative. The integration of wind turbine and wave energy device can provide complementary in energy and economic benefits. Feasibility studies on floating wind-wave platforms have been widely investigated (Cayuela-Padilla et al. in Sci Rep 14:16191, 2024 2; Ding et al. in Ocean Eng 313(Part 1):119453, 2024 5; Xu et al. in Renew Energy 237, 2024 26; Yazdi et al. in Energy 278, 2023 27; Yi et al. in Energy 296, 2024 28; Zhu et al. in Appl Energy 360, 2024 35). Specifically, wave energy converters are installed on a floating wind turbine foundation, allowing both the wind turbine and wave energy converters to share the same floating platform, mooring system, and power transmission system. This integration not only saves space in the ocean and reduces the operating costs, but also enhances the power generation. This chapter present a numerical investigation on dynamics and power extraction performance of a floating wind-wave platform.