In　the　process　of　auxiliary　tongue　diagnosis,　the　color　of　a　tongue　is　always　labeled　by　a　single-label.　In　fact,　the　tongue　color　is　changeable.　It　is　difficult　to　give　an　accurate　description　to　the　diversified　tongue　color　for　single-label　learning.　So　in　this　paper,　we　intend　to　give　a　new　group　of　labels　to　a　tongue　image　by　the　Label　Distribution　Leaning　(LDL).　The　value　of　each　label　is　its　description　degree　of　the　tongue　image　color.　Experimental　results　show　that　a　more　accurate　and　complete　description　to　a　tongue　image　is　given　by　LDL,　which　is　beneficial　to　the　further　development　of　auxiliary　diagnosis　based　on　tongue　color　in　Traditional　Chinese　Medicine.　©　2015　IEEE.