The　electromechanical　behavior　of　dielectric　elastomer　is　strongly　affected　by　the　temperature.　Very　few　models　accounting　for　the　effects　of　temperature　exist　in　the　literature.　A　recent　experiment　showed　that　the　variation　of　dielectric　constant　of　the　most　widely　used　dielectric　elastomer　(VHB　4910,　3M)　according　to　temperature　is　relatively　significant.　In　this　paper,　we　develop　a　thermodynamic　model　to　study　the　influence　of　temperature　on　the　instability　in　dielectric　elastomer　by　involving　deformation　and　temperature-dependent　dielectric　constant.　The　results　indicate　that　the　increase　of　temperature　could　improve　the　actuation　stress　and　the　electromechanical　instability　of　the　elastomer.