Have you ever heard of a nanotechnology before? If yes, what is a nanotechnology? Nanotechnology is a branch of technology that is designed in the size of nanoscale, where a dimension of a device that can be few nanometers or less. Due to its convenient in size and its role, nanotechnology is widely used in the various field such as computer manufacturing, communication, agriculture, home and business construction, medical, etc. However, nanotechnology is most developed in the medical field. Human has researched and used nanotechnology to provide prevention, diagnosing, and treatment of diseases in healthcare, therefore the application of nanotechnology in the medical field is known as a nanomedicine. Nanomedicine involves the use of nanoparticles and nanorobots in order to assist a physician to achieve various difficulties that it cannot be done manually by the human. Nanomedicine is commonly used in the medical field; however, people express their concerns about the nanomedicine legal and ethical issue where some believe that nanomedicine is not safe. Many researchers have conducted experiments and concluded that the nanomedicine will bring more benefits than disadvantages for the human.