Nanorobotics is the branch of nanotechnology. Nanorobotics is important in creating machines or robots which is close to the microscopic scale of nanometer (10-9 m). A nanorobot is a tiny machine and it is designed specifically to perform a specific or particular task repeatedly and with great precision at nanoscale dimensions. The diameter of nanorobot is about 0.5 to 3 microns and it is constructed out of parts which have dimension range of 1 to 100 nm. Nanorobotics has strong potential to revolutionized healthcare, to treat disease in future. Nanotechnology changes the shape of industry, broadening the product development and interrelationship between pharmaceuticals, biotechnology and healthcare industry. Nanorobots are used for various purposes in medical science.