The present invention discloses a brain wave monitoring device. The brain wave monitoring device comprises a brain wave acquisition unit, a processing unit, a MCU main control unit and a Bluetooth module; the brain wave acquisition unit is used for acquiring bioelectrical signals; the processing unit is used for converting the bioelectrical signals into digital signals, and the MCU main control unit is used for receiving the digital signals, processing the digital signals and then outputting data packets to the Bluetooth module; and the Bluetooth module is provided with a Mesh networking functional component, so that at least two brain wave monitoring devices can be connected through the Bluetooth module to form Mesh networking. The brain wave monitoring device can monitor and record brainwave data of testees in real time and form the Mesh networking with an external device through the Bluetooth module, when a plurality of the testees need to be monitored simultaneously, the pluralityof the brain wave monitoring device transmit the acquired data to the external device for integration and then transmit the data to an intelligent terminal device, so that the brain wave data of allthe testees can be acquired, the terminal intelligent device does not need to be arranged for each testee, and time and cost are saved.
Brain wave monitoring device, system and monitoring method