The invention relates to a naked-eye visible holographic stereo projection system controlled through an electroencephalograph. The holographic stereo projection system comprises the electroencephalograph and a holographic stereo imaging subsystem. The electroencephalograph comprises an electroencephalogram data collecting unit and a data sending unit. The holographic stereo imaging subsystem comprises a supporting shell, a data receiving unit, a control unit, an image source unit and a holographic imaging unit. According to the holographic stereo projection system, control over changes of a holographic stereo image visible to the naked eyes is achieved through changes of electroencephalogram parameters collected by the electroencephalograph, and thus a user can observe the changes of the own brain state visually. The holographic stereo projection system can serve as a system with both training and entertainment functions for psychological training, electroencephalogram biological feedback training and relaxing and pressure reducing training, and can also serve as an entertainment electronic system capable of being controlled by the brain.