The utility model discloses an intelligent control circuit of a potentiostat. The intelligent control circuit of the potentiostat comprises a signal amplification and conversion module, a communication control module, a signal source control module, a sampling input protection module, a level conversion module and an upper computer, wherein by virtue of the communication control module and the signal source control module which share work together, the potentiostat generates a plurality of wave shapes via the built-in signal resource instead of an external signal source, and the conventional digital display and external signal source are replaced. The intelligent control circuit disclosed by the utility model also has the advantages of being capable of acquiring test data safely and transmitting the acquired test data to the upper computer to be displayed as a virtual oscilloscope, being flexible and convenient to control, being capable of analyzing the data intelligently and the like.