Currently,ocean data portals are being developed around the world based on Geographic Information Systems(GIS) as a source of ocean data and information.However,given the relatively high temporal frequency and the intrinsic spatial nature of ocean data and information,no current GIS software is adequate to deal effectively and efficiently with spatiotemporal data.Furthermore,while existing ocean data portals are generally designed to meet the basic needs of a broad range of users,they are sometimes very complicated for general audiences,especially for those without training in GIS.In this paper,a new technical architecture for an ocean data integration and service system is put forward that consists of four layers:the operation layer,the extract,transform,and load(ETL) layer,the data warehouse layer,and the presentation layer.The integration technology based on the XML,ontology,and spatiotemporal data organization scheme for the data warehouse layer is then discussed.In addition,the ocean observing data service technology realized in the presentation layer is also discussed in detail,including the development of the web portal and ocean data sharing platform.The application on the Taiwan Strait shows that the technology studied in this paper can facilitate sharing,access,and use of ocean observation data.The paper is based on an ongoing research project for the development of an ocean observing information system for the Taiwan Strait that will facilitate the prevention of ocean disasters. Currently, ocean data portals are being developed around the world based on Geographic Information Systems (GIS) as a source of ocean data and information. However, the relatively high temporal frequency and the intrinsic spatial nature of ocean data and information, no current GIS software is adequate to deal effectively and efficiently with spatiotemporal data. Still existing, while existing ocean data portals are generally designed to meet the basic needs of a broad range of users, they are sometimes very complicated for general audiences, especially for those without training in GIS .In this paper, a new technical architecture for an ocean data integration and service system is put forward that consists of four layers: the operation layer, the extract, transform, and load (ETL) layer, the data warehouse layer, and the presentation layer. The integration technology based on the XML, ontology, and spatiotemporal data organization scheme for the data warehouse layer is then discussed. In addition, the oc ean observing data service technology realized in the presentation layer is also discussed in detail, including the development of the web portal and ocean data sharing platform. the application on the Taiwan Strait shows that the technology study in this paper can facilitate sharing, access, and use of ocean observation data. The paper is based on an ongoing research project for the development of an ocean observing information system for the Taiwan Strait that will facilitate the prevention of ocean disasters.