With　the　ever-increasing　demand　for　high　quality　video,　mobile　video　transmission　optimization　over　limited　wireless　network　capacity　has　been　attracted　extensive　attention.　HTTP　Adaptive　Bit　Rate　(ABR)　streaming　is　a　main　solution　to　provide　better　Quality　of　Experience　(QoE)　by　adapting　multimedia　content　over　wireless　channels　real-timely.　Deployment　of　caching　in　wireless　network　has　been　considered　as　another　effective　method　to　mitigate　redundant　data　transmission　over　backhaul　links　and　to　reduce　the　end-to-end　video　transmission　delay.　Although　some　works　have　been　done　for　HTTP　ABR　streaming　caching,　they　only　consider　the　users＇　QoE.　The　problem　of　energy-efficient　cache　resource　allocation　is　largely　ignored.　In　this　paper,　we　focus　on　the　problem　of　optimal　cache　resource　allocation　for　HTTP　ABR　streaming　in　cellular　networks.　Our　design　objective　is　to　maximize　both　the　users＇　QoE　and　energy　cost　saving.　We　formulate　the　content　cache　management　problem　as　two　sub-optimization　problems.　Then,　by　solving　the　two　sub-optimization　problems,　we　can　obtain　the　optimal　set　of　playback　rates　selected　by　users　and　the　MNO＇s　caching　policy　for　each　individual　content.　Finally,　simulation　results　are　presented　to　show　the　performance　of　the　proposed　cache　resource　allocation　scheme.