Windows　play　significant　roles　in　today＇s　buildings,　allowing　outside　view　and　providing　occupants　with　daylight.　However,　windows　are　also　often　considered　to　be　one　of　the　weakest　building　components　with　respect　to　high　thermal　losses,　and　therefore　significant　energy　consumption　is　required　to　maintain　a　comfortable　indoor　environment.　In　comparison　to　traditional　windows,　dual-band　electrochromic　smart　windows　have　the　ability　to　independently　regulate　the　transmittance　of　visible　and　near-infrared　light,　which　will　contribute　to　the　optimal　energy　efficiency　of　building　heating,　cooling　and　artificial　lighting　systems.　In　this　review,　the　basic　concept,　device　structure,　working　principle　and　key　factors　affecting　energy　saving　of　dual-band　electrochromism　are　briefly　introduced.　Next,　recent　advances　in　dual-band　electrochromic　materials　including　inorganic,　organic,　and　composite　materials　are　summarized　in　detail,　with　emphasis　on　device　fabrication　and　applications　in　building　energy　conservation.　Finally,　some　challenges　and　prospects　of　dual　band　electrochromic　smart　windows　are　introduced.　It　is　anticipated　that　this　review　will　provide　new　insights　into　the　development　of　high-performance　dual-band　electrochromic　smart　windows　toward　applications　in　the　green　buildings.　©　2023