Generation of a mesh model that can be analyzed with sufficient analysis accuracy for result evaluation and within a minimum possible calculation time even if a user does not grasp a tradeoff relation between analysis accuracy and analysis time due to mesh size is made possible. A mesh generation system designates an evaluation point (site) on an analysis target shape, analyzes plural analysis model data created with plural types of mesh size, stores a relation among mesh size, analysis result and calculation time in a mesh know-how DB, search for a mesh size which meets a required accuracy and calculation time limit, sets the mesh size that is found by the search to an analysis model. And displays the relation among mesh size, analysis result and calculation time.