To reduce the number of calculation models to be prepared and man- hour.

This system has memories 3-7 for storing a parameter study condition of a calculation model, a collision condition, initial shape data, material data and reference vector data or the like, an input part 1 for instructing a run of a structure analytic program, a parameter study input processing part 8 for selecting a target function while using the parameter study condition of the calculation model and for setting an itaration condition, a structure change part 11 for changing the shape of the calculation model or the like, a finite element operation part 13 for performing finite element operation according to the collision condition, a target function extracting part 15 for extracting a target function value on the basis of finite element operation result, a parameter study result processing part 17 for executing the parameter study operation on the basis of the extracted target function value, storing a parameter study operation history in a memory 18 and repeating this processing corresponding to the itaration condition and a display part 2 for displaying the parameter study operation result.