Cognitive　Radio　(CR)　is　an　emerging　technology　which　enables　a　secondary　user　(SU)　to　utilize　the　unoccupied　spectrum　holes　owned　by　a　primary　user　(PU)　through　spectrum　sensing　in　order　to　maximize　the　utilization　of　finite　spectrum　resources.　Although　CRNs　maximize　the　channel　bandwidth　resources　without　any　impact　upon　well-established　regulation　of　spectrum　allocation　but　on　the　other　hand　energy　consumption　can　be　a　challenge　as　efficient　performance　and　energy　consumption　coexists.　Spectrum　sensing　is　very　important　part　of　spectrum　management　in　CRNs　as　it　detects　the　free　bands　to　shift　over　the　transmission　of　SU　to　it　when　PU　comes　back　to　its　licensed　band.　In　this　research　we　proposed　a　novel　spectrum　sensing　strategy　that　performs　sensing　in　an　energy　efficient　manner　to　select　the　most　suitable　target　hole.　We　have　compared　our　proposed　strategy　with　existing　spectrum　sensing　strategies　in　CRNs　in　a　theoretical　manner.　Results　show　that　proposed　spectrum　sensing　strategy　has　better　performance　with　comparison　of　recent　technologies.　©　2020　IEEE.