Marine observation instruments are the basis for marine observation activities. Their performance affects the accuracy of marine observation data and the quality of marine observation activities. The standard system of marine observation is classified according to different observation platforms,and the basic parameters related to marine observation elements and their instruments are summarized. Then the general technical requirements of instruments are listed based on the characteristics of marine observation activities,which helps to promote the application of marine observation instruments. The quality control methods of ocean observation data are summarized from the aspects of calibration and on-site comparison,which provides support for improving the quality of marine observation data.