Double　diffusion　natural　convection　phenomenon　has　gained　significant　attention　in　different　fields　of　life　for　example　geology,　oceanography,　metallurgy　and　astrophysics.　The　present　disquisition　is　to　investigate　the　mathematical　analysis　of　fluid　flow　in　a　waver　cavity　in　the　presence　of　heated　circular　center　of　the　cavity.　The　mass　and　heat　transfer　on　MHD　Casson　fluid　flow　are　the　main　focus　of　current　study.　The　circular　center　of　cavity　is　kept　fixed　and　heated　while　the　right　and　left　walls　of　the　wavy　cavity　are　cold.　The　Lorentz　force　is　also　taken　into　consideration.　The　mathematical　problem　is　governed　in　form　of　coupled　partial　differential　equations　and　is　solved　by　using　well　know　finite　element　method.　Flow　distribution　analysis　is　discussed　in　form　of　streamlines,　isotherms　and　isoconcentration　contour　patterns.　The　obtained　results　are　also　represented　in　the　form　of　kinetic　energy,　local　heat,　and　mass　fluxes.　It　is　noted　that　under　the　increasing　effect　of　the　Casson　parameter　rate　of　heat　transfer　increase　while　the　rate　of　mass　transfer　decrease.