Metabolomics is a study of a complete set of metabolites in a specific cell or organism. Targeted Metabolomics is a quantitative method for the identification and quantitative analysis of targeted metabolic compounds in organisms. It provides information on the content and composition of metabolites, which are closely associated with the biological activities and can vary dramatically under different physiological conditions. Therefore, metabolomics methods are important for studying the biological function and comparing the metabolic systems of different organisms.