The observational data and reanalysis data are organized and registered with the Data Integration and Information Fusion Core System, together with the metadata, which describe the data attributes. Specifically, the data include ocean observational data that have a significant impact on climate conditions, ocean reanalysis data produced by combining observational data and ocean model simulations, and hydrological data on land to capture the exchange of water essential for human activities. In addition, by developing and operating an automated tool for registering metadata, we facilitate the creation of indices for easier data retrieval and catalog information for more effective data use.