The embossed bronze plate is a type of engraving art, and created by hitting a nail onto a bronze plate by a hammer. The final appearance critically depends on several factors such as the nail gauge and hit-point density. It is necessary to adequately determine them before the creation because the process is irreversible, which is not easy for novice creators. This paper describes a computer simulation system of embossed bronze plate creation, which allows users to estimate appearances by changing the nail gauge and so on. In the user-test, subjects reported that their creation process became much easier with the proposed system.