Electrochromic　(EC)　fabrics　based　on　conductive　polyaniline　(PANI)　have　demonstrated　important　application　potential　in　the　field　of　active　camouflage　due　to　their　ability　to　reversibly　switch　color　between　yellow　and　green,　while　their　practical　applications　are　greatly　limited　by　their　poor　cycling　performance.　Here,　a　modified　EC　PANI　is　developed　to　achieve　long-term　stable　optical　modulation　through　well-designed　anion　doping,　which　optimizes　the　energy　levels　and　also　the　microstructures.　The　modified　PANI　exhibits　an　improved　cycling　performance　and　could　achieve　a　high　optical　retention　rate　of　78%　even　after　6500　cycles　and　much　higher　than　that　of　pristine　PANI　(6.7%).　Also,　the　EC　fabric　equipped　with　modified　PANI　exhibits　excellent　cycling　performance　(900　cycles).　Furthermore,　the　EC　fabrics　are　developed　into　a　self-powered　environmentally　adaptive　camouflage　system　to　show　real-world　applications　in　active　camouflage.