The term “systems biology” is used to explain the three-dimensional scientific innovations and multidisciplinary research in life sciences. Systems biology is a new field in biological science, offering innovative approaches to usher in a new era in biological systems and to redesign various omics tools. It delivers new solutions to global healthcare, livestock management, and environmental challenges. Systems biology helps in understanding complete biological systems by elucidating, modeling, and predicting the behavior of all interacting partners and also explaining the interactions of biomolecules (genes, proteins, and metabolites) with respect to external stimuli. It provides a better picture of a system’s dynamics under different physiological and environmental conditions. Systems biology platforms are constantly being updated with new information. Researchers use these approaches to identify and visualize undiscovered mechanisms of biological systems. Right now, systems biology-based approaches are facing various challenges related to file format, data integration, modeling and simulation, platform limitation, and computation. There exist numerous opportunities to minimize the limitations of systems biology tools and databases for a better understanding of biological systems. In this chapter, we discuss the advances, applications, challenges, and opportunities of systems biology.