Nano technology is derived from the oldest science that can address almost all of our latest issues, in an extremely précised and accurate manner. Keeping the uniqueness of Nano particles, Nano technology has been integrated with Robotics, and has given birth to a new interdisciplinary called Nanorobotics. Because of the rare phenomena that Nano particles possess like self- replication, high surface area, particle size compatible with biological cells, etc it has a divergent applications in the field of medicine, which needs a continuous advancement. It has been made active in the fields of Cardio-vascular surgery, Oncology, Pharmacology, Drug delivery systems, Orthopedics Dentistry, Gene therapy, etc. here, the most essential qualities that a Nanorobot possesses, its structural features, classification and working mechanism is emphasized with practical approach. A scope for comprehensive work, implementation is also mentioned. So, the dream of the best health care to all is going to be fulfilled by Nano technology, a dawn in the medical engineering.