Medical treatment determines the national economy and people's livelihood. The modern medical technology not only depends on medical theory and practice, but also medical devices, medical protective equipment and medical environment. The quality control and improvement of medical devices need to be considered and analyzed from the aspects of selection and procurement, installation and acceptance, use and maintenance, measurement and test, quality control, safety management, maintenance and service, discard and scrapping, and technical training covering its whole life cycle. Let all links of measuring management can follow the scientific data; all aspects of quality improvement can be assessed with specific quantitative indicators. The accuracy, safety and reliability of medical equipment are ensured by technical means.