The purpose of this thesis is to explore the Chladni figures which are effected by various granular media size in resonant thin plate experiment. We choose Al and brass thin plates to investigate the phenomena for representing isotropic plate and anisotropic plate respectively. We spread various sizes of granular media on these two plates to progress the vibrating thin plate experiment. The characteristics of forming the nodal figures, the pattern forming time, the ways the pattern forming and how the mass of granular media on plate play the role are the specialties we concern. And we develop the theoretical model to calculate and reconstruct the Chladni figures of isotropic and anisotropic thin plates successfully. We figure out and explain it clearly the process and relations between granular media size and forming Chladni figures on isotropic plate and anisotropic plate.