Explore the fundamental concepts of entropy within the framework of quantum gravity in this 53-minute conference talk delivered at ICBS2025. Delve into the intricate relationship between thermodynamic entropy and gravitational systems at the quantum level, examining how entropy behaves in extreme gravitational environments and its implications for our understanding of spacetime. Investigate the theoretical foundations that connect information theory, black hole physics, and quantum mechanics, while analyzing current research developments in quantum gravity that address entropy-related phenomena. Gain insights into the mathematical frameworks used to describe entropic processes in quantum gravitational systems and understand the broader implications for cosmology and fundamental physics.