Abstract:Brain computer interface (BCI), as a special way of human-computer interaction, has attracted more and more attention and become a research hotspot in the field of artificial intelligence and control. Firstly, the concept of BCI is introduced systematically, and the key technologies and innovative developments involved in the study of electroencephalogram (EEG) are analyzed and summarized. In addition, the status and shortcomings of BCI system in communication function recovery, motion function recovery, vehicle driving control, environmental control and other application fields are discussed and analyzed. Finally, aiming at the key problems that BCI needs to be solved, a BCI + AI architecture based on cloud computing service mode is proposed.