Objective To put forward a design of the software of brainwave therapeutic apparatus based on the MCU. Methods Based on principle of electroencephalogram music treatment, several sound synthesis techniques were analyzed and contrasted. A simple and easily-realized one was selected and analyzed in detail. Finally, the output of brainwave therapeutic apparatus was tested and errors were analyzed. Results The selected scheme can effectively generate brainwave music. Conclusion According to the scheme, a low-cost and reliable brainwave therapeutic apparatus can be made by using the MCU.