A circuit optimization information management apparatus provides information to be used when a circuit parameter optimization program is executed to design an integrated circuit. The apparatus includes an accumulator for registering information relating to a candidate of a circuit type used in a design target circuit, a simulation test bench circuit corresponding to the circuit type, a simulation test input waveform and a circuit performance evaluation function for evaluating simulation results, and a feeder for selecting, in response to selection of the circuit type used in the design target circuit, information relating to the test bench circuit, the test input waveform and the performance evaluation function, corresponding to the selected circuit type registered in the accumulator and feeding the selected information to the circuit parameter optimization program.