Owing　to　the　fact　that　low　cycle　fatigue　(LCF)　of　material　is　a　process　of　energy　dissipation　and　relates　to　inelastic　response　of　material　in　the　process　of　fatigue,　area　between　the　inelastic　part　of　cyclic　stressstrain　curve　and　its　tangential　line　at　a　slope　of　E　(elastic　modulus　of　material),　which　is　similar　to　the　inelastic　part　of　complementary　strain　energy　density　in　the　figure　of　stress-strain　curve　of　material,　is　used　to　describe　the　process　of　fatigue　damage.　A　new　approach　to　determine　LCF　life　with　the　area　was　proposed　and　validated　by　LCF　tests　for　the　steel　30CrNiMo8　at　temperature　of　340°C　and　a　high　temperature　superalloy　at　temperature　of　900°C　under　push-pull　loading.　The　results　of　LCF　life　prediction　show　that　the　life　prediction　capability　of　the　method　proposed　in　this　paper　is　better　than　those　of　Manson-Coffin　equation　and　three-parameter　power　function.