As　a　new　type　of　optical　devices,　random　lasers　are　unique　in　concept　and　principle.　Due　to　the　unique　characteristics　of　optical　field,　simple　structure,　easy　preparation　and　low　cost,　random　lasers　have　wide　application　prospects　in　fields　of　imaging,　sensing,　and　photonic　chips.　The　optical　feedback　in　the　random　laser　is　provided　by　the　multiple　scattering　in　the　disordered　gain　medium.　The　inner　disorder　determines　many　emission　characteristics　of　random　lasers,　such　as　low　spatial　coherence,　random　emission　wavelength　and　direction.　The　output　directivity　of　random　lasing　is　an　important　factor　in　many　applications,　which　can　be　optimized　by　transferring　the　random　laser　on　fiber　facet.　Meanwhile,　the　random　laser　on　fiber　facet　is　of　benefit　to　miniaturization　and　integration　of　random　lasers.　In　this　review,　a　brief　introduction　is　given　about　the　basic　concept,　typical　characteristics　and　control　methods　of　random　lasers.　Importantly,　focusing　on　optical　fiber　facet-based　random　lasers,　we　emphatically　summarized　the　design　ideas,　preparation　methods,　emission　characteristics,　and　application　in　imaging/sensing.　Besides,　the　development　trend　of　optical　fiber　facet-based　random　lasers　is　prospected.