The present paper deals with thermodynamic properties of bilayer cuprate superconductors using an extended Hubbard model that includes the various intraplanar and interplaner contributions. It is shown that the thermodynamic properties like transition temperature, density of states (DOS) and electronic contribution to specific heat depend on the intrabilayer interactions as well as on doping level in an essential way. The theoretically evaluated nature of these properties are found to be in qualitative agreement with the existing experimental observations.