1. A method for producing, using a computer, a simulation model of a filler compound in which a filler is dispersed and mixed in a matrix, the method comprising: obtaining a microscopic image of an actual filler compound containing the matrix and the filler using a transmission electron microscope (TEM); defining a simulation-model forming space so as to include the matrix and the filler based on the microscopic image; processing the simulation-model forming space to extract an edge of the filler; partitioning, using the computer, the simulation-model forming space into a filler region and a non-filler region so as to determine a boundary between these regions based on the edge of the filler; dividing the filler region into a finite number of elements so as to set a filler model; dividing the non-filler region into a finite number of elements; setting, as an interface model, a finite number of first elements which are in contact with the filler model among the finite number of elements of the non-filler region, wherein the step of setting the interface model further comprises adding, as the interface model, a finite number of second elements in contact with an outside of the first elements in contact with the filler model; adjusting a thickness of the interface model according to sizes of the finite number of elements of the filler region; after setting the interface model, setting, as a matrix model, at least one element among the finite number of elements of the non-filler region, the at least one element being outside the interface model; and producing the simulation model of the filler compound according to the filler model, the interface model and the matrix model, the interface model being between the filler model and the matrix model, wherein the step of producing the simulation model includes continuous automatic processes performed by the computer to obtain a more accurate outline shape and dispersed state resembling an actual outline shape and dispersed state of an actual material of the filler compound, thereby reducing manual intervention for adjustment of the outline shape and dispersed state.