High-energy　radiation　detection　and　imaging　technology　has　important　applications　in　high-energy　physics　research,　medical　imaging,　industrial　detection,　and　other　fields.　Lead-free　metal　halides　have　many　advantages,　such　as　low　toxicity,　good　stability,　high　light　yield,　and　large　stokes　shift;　they　exhibit　excellent　potential　in　indirect　X-ray　detection.　The　latest　research　progress　of　lead-free　metal　halide　scintillators　and　imaging　devices　is　reviewed　herein.　First,　the　material　composition　and　luminescence　mechanism　are　introduced.　The　key　parameters　of　scintillator　performance　are　listed.　The　synthesis　methods　of　single　crystal,　powder,　and　nanocrystal　are　summarized.　Some　recent　novel　ideas　about　improving　the　resolution　of　imaging　devices　are　also　described.　We　focus　on　the　new-type　scintillator　imaging　devices,　including　composite　film,　ceramic,　glass,　and　structured　scintillators.　Finally,　we　have　summarized　the　challenges　and　potential　problems　of　scintillator　imaging　detectors　and　provided　some　suggestions.　©　2024　Universitat　zu　Koln.　All　rights　reserved.