Abstract： This paper introduces the clinical experience of GE Linyi， a Chinese medicine master， in diagnosing and treating geriatric diseases. According to the summary of the characteristics of pathogenesis of geriatric diseases by Prof. GE Linyi，the kidney essence is the basis and the kidney yin is the manifestation；the constitutions of the elderly easily change into deficiency or excess；the onset of disease is hidden，and sometimes several diseases coexist. In terms of syndrome differentiation，we should firstly inspect the vitality to examine the essential qi in the kidney，observe the body of patients and listen to their voices to examine the exuberance or debilitation of five-zang organs，and apply tongue diagnosis to detect the syndrome of cold， heat， deficiency or excess. We should take "treating the root，clearing the cause， supplementing deficiency， removing stagnation" as the principle. The common treatment methods include the method of boosting qi， warming yang and unblocking the collaterals， the method of tonifying qi， nourishing yin and moistening dryness， the method of nourishing yin，subduing yang and extinguishing wind，the method of tonifying the kidney，fortifying the spleen and resolving dampness，as well as the method of tonifying the kidney，supplementing essence and improving intelligence， and so on.