Ultraviolet　(UV)　absorbing　material　is　the　key　to　achieving　high　performance　UV　shielding　device.　Because　of　the　large　absorption　ability　on　UV　light　and　excellent　long-term　stability　under　UV　irradiation,　CeO2　nanoparticle　is　considered　potential　UV　absorber　for　practical　applications.　However,　the　CeO2　related　materials　still　face　challenges　since　its　UV　absorbing　capability　is　non-adjustable,　which　is　unable　to　meet　the　changing　requirement.　In　this　work,　we　obtain　serial　CeO2　nanoparticles　with　tunable　UV　absorbing　ability　through　F-　doping.　Using　undoped　CeO2　nanoparticles　with　size　of　about　6　nm　as　starting　material　and　trifluoroacetic　acid　as　F-　source,　serial　F-　doped　CeO2　marked　as　CeO2:F1,　CeO2:F-2,　CeO2:F-3　and　CeO2:F-4　are　obtained　through　a　post-　fluorination　strategy.　The　F-　doping　rarely　changes　the　size　of　CeO2,　but　obviously　changes　the　optical　absorbing　ability.　As　the　F-　content　increases,　the　optical　absorption　band　of　the　F-　doped　nanoparticles　gradually　shifts　to　short　wavelength.　Because　of　the　highest　F-　content,　CeO2:F-4　sample　displays　the　greatest　blue　shift　with　an　absorption　band　of　345　nm.　Calculation　result　reveals　that　the　introduction　of　F-　enlarges　the　energy　band　gap　of　CeO2,　leading　to　the　blue　shift　of　the　UV　absorption　band.　Finally,　serial　coated　glasses　with　tunable　UV　shielding　ability　are　prepared.　Using　CeO2　nanoparticles　or　F-　doped　CeO2　nanoparticles　as　UV　absorber,　the　optical　absorption　band　of　coated　glasses　could　be　tuned　between　380　nm　and　345　nm.