A painting system of brainwave includes a brain activity sensing unit, an interface unit, and an output unit. The brain activity sensing unit is configured to capture a brainwave signal, the interface unit is electrically connected to the brain activity sensing unit, and the output unit comprises a coloring device, wherein the interface unit amplifies and converts the brainwave signal for the coloring device of the output unit generating an action corresponding to the brainwave signal.一種腦波繪畫系統,包括腦部活性感測單元、介面單元以及輸出單元。腦部活性感測單元用以擷取腦波訊號,介面單元與腦部活性感測單元電連接,輸出單元包括著色裝置,其中介面單元放大以及轉換腦波訊號,用以供輸出單元之著色裝置產生相應腦波訊號之動作。