Observing the unique properties of matter at nanoscale, nanoscience provides innovative solutions for energy, environment, agriculture, and manufacturing, and addresses the critical challenges of sustainability. This chapter highlights nanotechnology's pivotal role in advancing sustainability across diverse domains including medicine, consumer products, and energy optimization. Ethical considerations, potential benefits, and future prospects are thoroughly examined, providing a comprehensive overview of nanotechnology's transformative capacity. The rational design of nanomaterials achieves exceptionally high surface areas, offering strategic enhancements. In the era of electronics, nanotechnology accelerates devices, enhances memory chip density, and reduces power consumption, shaping a more sustainable technological future. The chapter serves as a valuable reference for research community, offering insights into applications of nanotechnology in sustainable development circular economy, and aims to deepen understanding and exploration of nanotechnology's potential to drive positive change.