Tongue diagnosis of traditional Chinese medicine has a long history, and there have been relevant records of tongue diagnosis as early as 3000 years ago. Tongue diagnosis is a diagnostic method to diagnose diseases and understand the development and changes of the disease by observing people's tongue pictures. It is an important basis for syndrome differentiation and treatment of traditional Chinese medicine, and it is simple and easy to learn. Through tongue diagnosis to understand the health status of yourself and your family, to achieve the goal of prevention before disease and disease prevention.