A control apparatus structuring system for facilitated handling of a nonlinear control object, using a generic form of control rules, and which stably reaches a target value by setting plural virtual target values corresponding to the system states and by selecting one according to the distance to the target value. A processor performs a signal conversion function to realize input/output characteristics for a given teacher signal group. A virtual target controller controls advance knowledge about data relations between control state volumes. A calculator calculates a correction volume of a control state volume from the control state volume of a control object and a virtual target value defined by the control data of the virtual target controller corresponding to the control state volume. The system structures the processor to a desired control apparatus by giving an input of the control state volume to the processor, by supplying an output as the control operation volume to the control object, by obtaining a teacher signal through a correction of the control operation volume according to the correction volume then outputted from the calculator. The processor receives the difference between a current state volume and a targeted control state volume. The virtual target controller controls the advance knowledge about data relations between control state volumes by parametrizing the difference between a control state volume and its control target value.