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This review is provided detailed overview of the types, properties and application of nanorobot in the diagnosis, prevention and treatment of various diseases. Now a day’s health care industry focusing on the development of nanotechnology for the diagnosis and treatment of various diseases. Development of nanorobots is an interesting and hopeful area of nanotechnology which is produce on nanoscale. Many drugs exhibit is the problem of less bioavailability of drug and require the administration of higher amount for treatment of various diseases. To overcome such problem, nanorobot are the novel solution that deliver the drug to the target thus small dose is sufficient to achieve the desired therapeutic effect. Nanorobots are tiny device which is measure on the nanometer scale. Nanorobots also known as nanite, nanobots, or nanomites. Nanorobots are used in the diagnosing, treatment and prevention of the diseases, relieving pain and improving the human health.