Abstract："The stomach likes moistening and dislikes dryness" is one of the physiological characteristics of the stomach. Compared with "the spleen likes dryness and dislikes dampness"， it has an independent theoretical system， syndrome differentiation criteria and treatment methods. This paper analyzes the meaning of "stomach likes moistening and dislikes dryness" from body yang and yin，and explains the physiological characteristics，pathogenesis，syndrome and treatment of "stomach likes moistening and dislikes dryness". When the stomach feels external evils or internal injuries and miscellaneous diseases， it is easy to suffer from yang ming heat syndrome， which damages the body and yin. In the diagnosis and treatment，we should identify the body，call the treatment body，and control its evil according to its nature. Clinically，we should use more products that increase fluid and nourish yin，and be careful with warm dryness. Therefore，we put forward the treatment methods of increasing fluid and nourish yin，tonifying the kidney and fixing the root，so as to provide a basis for theoretical discussion and clinical treatment.