In this paper, two design procedures of the Floating Kuroshio Thrbine blade geometries are presented. The first one is similar to the propeller design method, the lifting line method is used for the design of the loading distribution, and the lifting surface method is then adopted for the blade geometry design. The second design procedure uses Genetic Algorithm method to design the turbine blade geometry. Hydrodynamic performances of the marine current turbine are then computed and analyzed by the potential flow boundary element method and the viscous flow RANS method. The design of a 20kW floating type current turbine is demonstrated in the paper, and the design results show the geometries designed by the presented procedures satisfy the design goal. It is believed that both methods are applicable for the current turbine blade designs.