The　excellent　luminescence　properties　of　perovskite　quantum　dots　(PQDs),　including　wide　excitation　wavelength　range,　adjustable　emission　wavelength,　narrow　full　width　at　half　maximum　(FWHM),　and　high　photoluminescence　quantum　yield　(PLQY),　highly　match　the　application　requirements　in　emerging　displays.　Starting　from　the　fundamental　structure　and　the　related　optical　properties,　this　paper　first　introduces　the　existing　synthesis　approaches　of　PQDs　that　have　been　and　will　potentially　be　used　for　display　devices,　and　then　summarizes　the　stability　improving　approaches　with　high　retention　of　PQDs’　optical　performance.　Based　on　the　above,　the　recent　research　progress　of　PQDs　in　displays　is　further　elaborated.　For　photoluminescent　display　applications,　the　PQDs　can　be　embedded　in　the　backlighting　device　or　color　filter　for　liquid　crystal　displays　(LCD),　or　they　may　function　as　the　color　conversion　layer　for　blue　organic　light-emitting　diodes　(OLED)　and　blue　micro-scale　light-emitting　diodes　(μLED).　In　terms　of　next-generation　electroluminescent　displays,　notable　progress　in　perovskite　quantum-dot　light　emitting　diodes　(PeQLED)　has　been　achieved　within　the　past　decade,　especially　the　maximum　external　quantum　efficiency　(EQE).　To　conclude,　the　key　directions　for　future　PQD　development　are　summarized　for　promising　prospects　and　widespread　applications　in　display　fields.　©　2022　by　the　authors.　Licensee　MDPI,　Basel,　Switzerland.