1. A modeling method of creating a three-dimensional analysis model of a target object for extracting parameters that are used to analyze a high-frequency transmission, comprising: a selecting step selecting, from an art work data of the target object, an extraction target region that becomes a target for extracting the parameters that are used to analyze the high-frequency transmission; a deleting step deleting non-extraction target elements of the extraction target region, that do not affect an electromagnetic analysis and are other than extraction target elements that affect the electromagnetic analysis; a linearizing step linearizing, from among the extraction target element, a curved wiring; and an optimizing step optimizing a wiring length of the extraction target region including the linearized wiring and optimizing an analyzing space dimension of the extraction target region, so as to create the three-dimensional analysis mode.