The　Ginzburg-Landau　theory　and　dipole　defect　model　have　been　employed　to　investigate　the　flexoelectric　and　ferroelastic　effects　on　the　ferroelectric　and　energy　storage　properties　of　relaxor　ferroelectrics　(RFs).　The　results　obtained　show　that　due　to　the　existence　of　polar　nanoregions　(PNRs)　in　RFs,　the　elastic　field　of　the　material,　which　is　induced　by　both　the　flexoelectric　and　ferroelastic　effects,　leads　to　the　increase　of　the　domain　switching　energy　and　coercive　field　and　the　decrease　of　the　energy　storage　efficiency.　In　contrast,　the　short-range　electric　field　induced　by　the　dipole　defects　enhances　the　energy　storage　efficiency　of　the　material　by　enhancing　the　material＇s　relaxor　behavior.　Hence,　the　energy　storage　efficiency　of　RFs　can　be　effectively　functionalized　by　modulating　the　composition　ratio　and　the　electric　field　of　the　RF　materials.