Thermochromic　smart　windows　with　adjustable　electromagnetic　interference　(EMI)　shielding　capability　are　integral　elements　in　modernized　buildings,　especially　in　military　applications,　due　to　their　energy-saving　benefits　and　ability　to　mitigate　electromagnetic　pollution.　However,　its　application　is　limited　by　the　relatively　poor　light　transmission　of　conductive　substances　and　the　high　demand　for　light　transmission　of　thermochromic　smart　windows.　Maintaining　the　thermochromic　performance　of　smart　windows　while　adjusting　EMI　shielding　effectiveness　(SE)　poses　a　significant　challenge.　Here,　we　propose　a　straightforward　approach　to　create　a　smart　EMI　shielding　material　with　adaptable　properties,　including　light　transmission,　shape,　and　EMI　SE.　This　method　involves　a　layer-by-layer　polymerisation　process　followed　by　solvent　substitution.　The　resulting　hydrogel　exhibits　tunable　optical　properties,　making　it　suitable　for　use　as　a　smart　window　that　responds　to　external　conditions　and　offers　local　tunability.　Noteworthy　characteristics　include　high　light　transmittance　(80.87　%),　ultra-fast　response　time　(16　s),　multiple　shape　adjustments,　adjustable　EMI　SE　ranging　from　0　to　27.64　dB,　and　strong　adhesion,　among　other　features.　These　findings　suggest　that　the　obtained　hydrogels　have　significant　potential　to　provide　a　substantial　advantage　in　developing　next-generation　soft　and　intelligent　smart　EMI　shielding　windows.　©　2024　Elsevier　B.V.