In　order　to　address　the　issue　of　intermittent　and　unstable　solar　energy,　a　double　-effect　three-phase　energy　storage　device　with　high　and　low　pressure　solution　tanks　is　presented　in　this　study　to　replace　the　supplementary　heater　for　the　solar　air　conditioning　(SAC)　system.　The　components　of　the　solar　double　-effect　three-phase　energy　storage　system　are　suitably　matched　and　developed,　and　the　system　＇　s　composition　and　operating　principle　are　described　in　detail.　Each　component　＇　s　mathematical　model　is　constructed,　and　the　system　＇　s　operational　characteristics　are　examined.　On　the　basis　of　the　life　cycle　theory,　a　3E　analysis　of　the　environmental　influence,　energy　consumption,　and　economics　throughout　the　life　cycle　of　this　system　is　carried　out.　The　results　show　that　the　system　has　an　energy　storage　efficiency　of　1.37　and　an　energy　storage　density　of　439.18　kWh/m　3　.　Over　the　life　cycle,　the　system　has　a　53.3　%　reduction　in　environmental　influence　load,　a　55.2　%　reduction　in　energy　consumption,　and　a　16.2　%　reduction　in　total　cost　compared　to　the　conventional　electrically　driven　vapor　compression　system.