Nanotechnology is production and investigation of miniaturized materials that could be seen by the human eye beyond and working on techniques to exploit them. Growing interest in the future medical applications of nanotechnology is leading to the emergence of a new scientific field that called as nanomedicine. This technology has great potential to provide medical diagnosis, monitor treatment and help in the development of new tools for infectious disease prevention and/or management. The results of these studies are called nanomedicine. Nanomedicine may be defined as the investigating, treating, reconstructing and controlling human biology and health at the molecular level, using engineered nanodevices and nanostructures. This multidisciplinary science, medical and biomedical applications, environmental pollution control, cosmetics, optics, textile, electronics and so on are used. In this study, nanotechnology and nanomedicine fields are examined. Nanomaterials, nanostructures and nanosystems are the most popular and innovative approaches for medical applications. Clearly nanotechnology, has revolutionized medical diagnosis and treatment, and unprecedented methods and opportunities have come to the forefront.