Tongue diagnosis is belongs to inspection diagnosis which is one of the four diagnostic methods of traditional chinese medicine.It is the essential points for diagnosing diseases and precious experience in TCM.Changes of the tongue condition can diagnose disease and guide clinical application,which have been researched quiet actively in various of diseases.In the field of kidney disease,tongue changes are related to syndrome classification in TCM,metastasis status、prognosis and different pathological types and dialectical medication.At the same time,the achievements of research are increasingly rich and mature.Tongue diagnosis of TCM can provide positive effect for clinic diagnosis、treatment and prevention of kidney disease.