The invention relates to a pharyngeal cavity electronic larynx synthesis and communicated system which can be automatically regulated and a method thereof, wherein a device based on a software platform and external hardware of a computer comprises a camera, a microphone and an electronic larynx oscillator; the automatic control to the working state of the electric larynx and the voice source synthesis of the pharyngeal cavity is realized through extracting visual phonetic feature information of movement images of the face and the neck of a user, thereby the electronic larynx can be used without holding by hands, which is simpler and more convenient, and the problems that the synthesis voice source is not consistent with the electronic larynx applying part and the voice of the electronic larynx is mechanical and unnatural are solved; and meanwhile, the dynamic de-noising enhancement treatment is implemented for the voice rebuilding of the pharyngeal cavity electronic larynx, thereby the quality and the intelligibility of the rebuilt voice are improved; and the remote real-time communication of the voice of the electronic larynx is realized through the network transmission technique, the application range of the electronic larynx is further expanded, and the life quality of a patient after laryngectomy is improved.