Comprehensive investigations of metabolites in plant tissues and cells are the focus of the quickly developing area of plant metabolomics, which is a subfield of plant sciences and systems biology. Metabolomics is the study of the functionality of particular metabolites like sugars, amino acids, organic acids, lipids, and a small number of secondary metabolites, including flavonoids and alkaloids, as well as other compounds involved in the physiology, developmental processes, and biotic and abiotic stresses. The plant metabolomics data can be used to generate genetically modified crops, improve plant yield, and boost the relationship between microorganisms and plants. The methods of systems biology and plant science are reflected in the chapter in order to help researchers comprehend the intricate relationships that exist within plants or plant microbes. The plant metabolomics will play an even greater role in improving our knowledge of plant systems and the creation of innovative approaches for a sustainable future in technological advancement and analytical techniques.