Audio denoising system and method of vehicular radio

The invention relates to an audio denoising system of a vehicle radio. The audio denoising system comprises an analog-digital converter, a digital signal processor, a digital-analog converter and an audio power amplifier, wherein the analog-digital converter is used for receiving analog output of the vehicular radio and converting the analog output into first digital signals which are arranged in a time domain, the digital signal processor is used for subjecting the first digital signals in the time domain to Fourier transformation to be second digital signals within a frequency domain, the second digital signals are subjected to noise component removal, and the denoised second digital signals are converted into third digital signals by Fourier inverse-transformation and within the time domain, the digital-analog converter is used for converting the third digital signals into analog audio output, and the audio power amplifier is used for receiving the analog audio output and driving operation of a loudspeaker. The invention further provides an audio denoising method of the vehicular radio.