The invention provides an audio acquisition method and an audio acquisition device. The method comprises steps: a piezoelectric sensor is used for acquiring mechanical waves generated due to vibration of a user body, and the mechanical waves serve as first audio signals; a microphone is used for acquiring sound waves in an environment in a mechanical wave generation time range, and the sound waves in the environment serve as second audio signals; and voice information in the first audio signals and the second audio signals is extracted, and voice signals are generated according to the voice information. Thus, the voice information in the environment can be extracted from the mechanical waves generated due to the vibration of the user body and the sound waves in the surrounding environment, the problem that the audio acquisition is instable in a related technology can be solved, the voice signal quality is enhanced, and the user experience is improved.