Electrochromic　energy　storage　devices　(EESDs)　integrate　energy　storage　and　electrochromism　into　one　smart　device　that　can　realize　the　visualization　of　the　energy　level　by　the　naked　eyes,　which　has　attracted　extensive　attention　in　recent　years.　It　is　critical　to　explore　suitable　electrode　materials　for　achieving　both　high　electrochromic　and　electrochemical　performance.　Herein,　we　propose　an　aqueous　aluminum-ion　electrochromic　energy　storage　device　(AIEESD)　by　assembling　the　polyaniline　(PANI)　electrochromic　cathode,　Al　metal　frame　anode　and　AlCl3　electrolyte,　which　yields　an　open-circuit　voltage　of　similar　to　1.22　V　and　a　fast　self-bleaching　behavior　without　any　energy　input.　Additionally,　the　developed　device　exhibits　outstanding　electrochromic　energy　storage　performances　with　discharging　capacity　of　68.1　mAh　m(-2),　excellent　rate　capability,　large　optical　modulation　(Delta　T　=　55%　at　630　nm)　and　high　coloration　efficiency　(93.62　cm(2)　C-1　at　630　nm).　Moreover,　the　prototype　device　can　reversibly　switch　between　the　multicolor　(transparent,　light　yellow,　green　and　dark　blue)　when　the　voltage　changes　from　0.4　to　2.5　V,　which　means　the　energy　status　can　be　monitored　by　the　obvious　color　transition.　These　results　show　that　the　AIEESD　in　this　work　has　great　application　prospects　for　smart　windows　and　energy　storage　displays.