Abstract: Microcomputer system consists of a newly designed mainframe (including 4 microcomputer chips 8085, 8155, 8185 and 8755, a multiwaveform generator, a special keyboard, a display panel and interfaces) and peripherals (including a XY plotter, an oscilloscope, a camera etc.). The system can generate the complex stimulating sound with programmable parameters, process the bioelectric pulses recorded from the experimental animal, change the way of experimental observation according to the results obtained, transfer the data of results to XY plotter and plot in the form of histogram. A series of programs for routine experiments are available and easy to use. In addition, there are also a variety of subroutines in the EPROM. It is possible and convenient to make new programs according to user's intention. By combining digital and analogue circuits the system can be built with little hardware resources and investment and have reasonable performance.