The utility model discloses a half conductor temperature control system based on analog control technique, including central processing unit, central processing unit's input is connected the output electricity of module no. 2 with signal amplifier, temperature setting module and temperature ratio respectively, and signal amplifier's input is connected with the output of AD converter electricity, and the input of AD converter is connected with temperature sensor's output electricity. This half conductor temperature control system based on analog control technique, through setting up temperature sensor, the temperature ratio is to module no. 1 and temperature ratio to module no. 2, real -time detection object body temperature degree has been reached, and through the temperature ratio to module no. 1 with compare module no. 2 and compare measure the temperature in real time, detect out object real -time temperature and whether be higher than standard temperature or be less than standard temperature through comparing, heat up or cool down article through comparison result drive control by temperature change executor, thereby the effect of precise adjustment target article temperature has been reached.