An embodiment of the present invention discloses a hardware circuit building method, so as to solve a problem that a nonlinear factor is not taken into account when a hardware circuit is built by using an existing tension kinetics method, so that a hardware circuit system has a relatively large error, thereby reducing reliability of the hardware circuit system. The method comprises: firstly, acquiring an actual output value of a current hardware circuit; acquiring an expected output value of a hardware circuit that needs to be built; according to the actual output value and the expected output value, acquiring a deviation function of the hardware circuit that needs to be built; setting a convergence coefficient of a building function according to the deviation function, so that an output result of the building function converges within a preset time; and according to the building function, building the hardware circuit that needs to be built. An embodiment of the present invention further provides a hardware circuit building apparatus.