Abstract: With the aid of previous research on ocean wave spectrum and the magnetic field induced by ocean waves,the power transfer function of ocean wave-magnetic field system is determined.The peak value of the transfer function and the corresponding frequency are determined and the changes of these two quantities as a function of height are analyzed.According to the theoretical analysis,the analytical expression of the total magnetic power is determined and the equation that the peak-power frequency satisfies is provided.It is pointed out that the induced magnetic field is a narrow-band process.Finally,the power spectral density,total power,the maximum of the PSD,maximum frequency and equivalent frequency of induced magnetic field are calculated for some typical wave spectra.