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Thin-walled objects, such as sheet metals or resin parts, are modeled as mid-surface in finite element analysis (FEA), where the extraction of mid-surface mesh is still problematic especially for objects with complicated contours. In addition, market demand for more variety of new designs required the modeling to be done in much shorter time, which makes it indispensable to improve the meshing efficiency. As an attempt to improve the modeling efficiency for thin-walled objects, an automatic tool was developed to retrieve mid-surface mesh from an input 3D computer-aided design (CAD) data, which has its own shape recognition engine and mesh-rule knowledge database that enables it to recognize shape and generate and control mesh configuration/pattern at the mid-surface position. Moreover, this will provide the users with controllability over mid-surface generation and meshing process for various features such as ribs, fillets, holes, clips, and many others.