Abstract： This paper introduces Professor JI Yunxi's clinical experience in treating senile insomnia based on Chinese medicine diagnostic method of dreams. Diagnostic method of dreams is a supplement and extension of the clinical four examinations (inspection， listening and smelling， inquiry， pulse examination). Specifically，it is to speculate the patient's mental state and causes of disease by combining the basic principles of Chinese medicine with comprehensively and carefully analyzing the characteristics of the patient's dreams， such as what you want or desire in dreams， attributes of five phases， number of dreams and so on， which helps to diagnose senile insomnia. Yin dreams are the characteristics of senile insomnia， and Professor JI Yunxi uses the method of warming yang to it， which results in a significant effect.