In　this　work,　the　thermo-optic　effect　in　polymers　was　used　to　realize　a　temperature-tunable　whispering-gallery-mode　laser.　The　laser　was　fabricated　using　a　capillary　tube　filled　with　a　light-emitting　conjugated　polymer　solution　via　the　capillary　effect.　In　the　whispering-gallery-mode　laser　emission　wavelength　can　be　continuously　tuned　to　about　19.5　nm　using　thermo-optic　effect　of　polymer.　The　influence　of　different　organic　solvents　on　the　tuning　rate　was　studied.　For　a　typical　lasing　mode　with　a　bandwidth　of　0.08　nm,　a　temperature-resolved　tuning　rate　of　similar　to　1.55　nm/degrees　C　was　obtained.　The　two-ring　coupling　effect　is　responsible　for　the　suppression　of　the　WGM　in　the　micro-cavity　laser.　The　proposed　laser　exhibited　good　reversibility　and　repeatability　as　well　as　a　sensitive　response　to　temperature,　which　could　be　applied　to　the　design　of　photothermic　and　sensing　devices.