The 3D(three-dimensional)temperature and salinity field information of the ocean is an important parameter for describing the physical properties of the ocean and mastering the process of ocean physical movement. Obtaining accurate 3D temperature and salinity information of the ocean is of great significance for understanding, developing and utilizing the ocean,and marine scientific research. With the development of artificial intelligence and deep learning methods,intelligent detection of subsurface 3D temperature and salinity fields using deep learning methods has become one of the hotspots. This article reviews the research progress related to intelligent detection of 3D temperature and salinity fields of the ocean from the perspectives of ocean temperature and salinity observation datasets,traditional machine learning-based 3D temperature and salinity intelligent detection,general neural network-based 3D temperature and salinity intelligent detection,and deep learning-based 3D temperature and salinity intelligent detection. Finally , the problems and future development trends of intelligent detection of 3D temperature-salinity fields are summarized and prospected.