With　China＇s　＇dual　carbon＇　target,　low　carbon　transition　has　become　an　crucial　goal　for　the　future　development　of　the　power　system,　and　due　to　the　rapid　increase　in　the　renewable　energy　penetration,　a　single　time-scale　energy　storage　will　be　difficult　to　meet　all　the　needs　of　the　power　system.　For　this　reason,　this　paper　firstly　introduces　a　shunt-type　carbon　capture　plant　and　a　liquid　storage　tank　to　realize　the　flexible　operation　of　the　carbon　capture　system　and　reduce　the　carbon　emission　of　the　power　system.　Secondly,　combining　the　advantages　of　electrochemical　energy　storage　and　hydrogen　energy　storage　technologies,　integrating　the　dual　regulation　of　short-term　power　and　long-term　energy,　and　aiming　for　the　minimum　systematic　annualized　combined　cost,　a　joint　long-term　and　short-term　energy　storage　planning　model　is　developed.　Finally,　using　a　region　in　eastern　China　as　an　example,　it　is　verified　that　the　planning　methodology　proposed　in　this　paper　can　promote　the　low-carbon　transition　of　the　power　system　while　improving　the　planning　economics　of　the　future　power　systems.　©　2023　IEEE.