The utility model relates to a special-purpose control chip and a controller for a stirrer, which is characterized in that the internal part of a chip is integrated with an electric reset circuit, an annular oscillator circuit, a zero-crossing detecting circuit, a key detecting circuit, a state indicating circuit of controlled silicon and an input control circuit of optical coupling controlled silicon. The utility model makes the chip as a core. The periphery of the utility model is provided with each operating key, an LED display, a drive circuit of optical coupling controlled silicon and a relay drive circuit. The utility model which is provided with a dedicated chip forms a stirrer dedicated controller with a dedicated chip. The utility model has the advantages of simple structure, simple debugging work and low cost.