Brain-computer interaction system and method based on tongue movement

The invention discloses a brain-computer interaction system based on tongue movement. The brain-computer interaction system comprises a neural signal acquisition device, an input device, an output device and a processor, the electroencephalogram storage cutting module is configured to record electroencephalogram signals under specific tongue movement through neural signal acquisition equipment in combination with a set instruction sequence or input cutting of input equipment; the recognition module is configured to filter and extract features of the electroencephalogram signals transmitted by the user in real time by using an existing model or a temporarily trained model of the user under the adjustment of the input equipment, and calculate and feed back tongue movement information existing in the electroencephalogram signals; the interaction module is configured to be a graphical interface, prompts a user to carry out operations, accepts tongue movement of the user to react, and plays or activates correspond