The invention relates to the field of optical fiber acoustic sensors, and particularly provides an optical fiber MEMS microphone array acoustic detection plate and system. The optical fiber MEMS microphone array acoustic detection plate and system are used for filling up the blank of acoustic detection and sound localization through array combining of optical fiber MEMS microphones. According to the optical fiber MEMS microphone array acoustic detection plate and system, an MEMS membrane is applied to optical fiber acoustic sensors, the sensitivity of the optical fiber microphone acoustic sensors is improved, the preparation and assembly are more convenient, and the optical fiber MEMS microphone array acoustic detection plate and system have the advantages of being small in size, free of metal, high in sensitivity and the like; the optical fiber MEMS microphone array acoustic detection plate and system can be better applied to monitoring occasions, locating occasions and other occasions which need high invisibility, and can also be better applied to far-distance space sound localization, non-contact fault audio detection of a mechanical device, remote sound signal pickup and otherfields; meanwhile, the single-point optical fiber MEMS microphone acoustic sensors are subjected to array combining, and the sound signals can be detected and located.