Polyoxometalates　(POMs)　are　an　intriguing　class　of　compounds　that　have　been　extensively　studied　due　to　their　unique　structures　and　diverse　properties.　In　the　past　years,　the　synthesis　of　POM-based　all-inorganic　open　frameworks　has　attracted　increasing　attention　due　to　their　potential　applications　in　various　fields,　such　as　in　electrode,　magnetic,　and　catalytic　materials.　This　review　not　only　provides　a　comprehensive　survey　on　POM-based　all-inorganic　open　frameworks,　including　their　structures,　properties,　and　potential　applications,　but　also　discusses　the　current　challenges　in　this　field　and　provides　an　outlook　for　future　research　directions.　©　2023　Elsevier　B.V.