An　ultra-wide　temperature　stable　ceramic　system　based　on　(1-x)　[0.94(0.75Bi(0.5)Na(0.5)TiO(3)-0.25NaNbO(3))-0.06BaTiO(3)]-xCaZrO(3)　(CZ100x)　is　developed　for　capacitor　application　in　this　study.　All　samples　exhibit　characteristics　of　pseudocubic　structures　in　XRD　patterns.　With　CaZrO3　addition,　the　coupling　effect　of　polar　nanoregions　(PNRs)　is　weakening,　leading　to　greatly　improved　temperature　stability　of　dielectric　properties.　Among　all　samples,　the　most　attractive　properties　are　obtained　in　the　composition　of　CZ10　at　＜15%　variation　in　dielectric　permittivity　spanning　from　-55　degrees　C　to　400　degrees　C　and　lower　than　0.02　of　dielectric　loss　of　between　-60　degrees　C　and　300　degrees　C,　accompanied　by　high　DC　resistivity　(10(7)　m　at　300　degrees　C,　calculated　by　fitting　Jonscher＇s　power　law).　Furthermore,　tentative　multilayer　ceramic　capacitors　(MLCCs)　composed　of　CZ10　dielectric　and　Ag:Pd　(70:30)　internal　electrode　layers　were　fabricated　by　tape　casting　and　cofiring　processes.　Temperature-stable　dielectric　property　in　formation　of　MLCC　was　successfully　realized,　with　small　C/C-25　degrees　C　(＜15%)　and　loss　factor　(　0.02)　between　-55　degrees　C　and　340　degrees　C.　Meanwhile,　CZ10-based　MLCC　showed　temperature-insensitive　energy　storage　density　of　0.31-0.35　J/cm(3)　and　high-energy　efficiency　of　above　77%　at　120　kV/cm　in　the　range　of　-55　to　175　degrees　C.　All　of　these　exhibit　wonderful　temperature-stable　dielectric　properties　and　indicate　the　promising　future　of　CZ10　dielectric　as　high-temperature　ceramic　capacitors.