Metal-halide　open　frameworks　is　a　family　of　important　inorganic　porous　crystalline　materials　not　only　due　to　their　intriguing　architectures　for　crystal　engineering　but　also　for　their　wide　applications　in　optoelectronic　devices,　photocatalysis,　luminescence,　thermochromism,　photochromism,　and　so　on.　In　this　review,　a　survey　of　the　structural　chemistry　of　three-dimensional　non-perovskite-type　metal-halide　open　frameworks　is　presented.　In　addition,　on　the　basis　of　current　advances　in　metal-halide　open　frameworks,　the　development　prospects　and　the　current　challenges　for　such　materials　are　also　discussed.　(C)　2020　Elsevier　B.V.　All　rights　reserved.