Most provinces in Indonesia will be facing water scarcity problems in the next decades due to increasing water demands resulting from population growth, urbanization and economic and industrial developments. As a consequence, they will also be facing a number of problems with regards water resource management, such as a lack of data and information needed to evaluate the real status of water resources, the unsystematic development of relevant infrastructure and economic instruments, inadequate human resources for the operation and maintenance of water resources, and a lack of interest in improving research and development activities. This paper examines the application of data and information management for improved water resources management in Indonesia through “one door data service system” linked among the related institutions from different sectors and levels both at the central and regional government agencies. One of the key solutions to help solve water resource problems would therefore be to obtain supporting data and information by developing an information system and water resources data centre (WRDC). Rapid developments in information and communication technology (ICT) could be used to support data communication and management requests in order to build capacity of the water resources sector, and as a prerequisite for an integrated water resources management program. Improved efficiency and effectiveness could be achieved by making relevant data and information available, as well by establishing a communication system among related institutions. Further, provinces should also prioritize developing human and social capital through education, service delivery and career development, as well as training for water resources development and management. Data and information such as the hydrological and water quality data, information of water resources potential, irrigation areas, population and economic growth as well as the others related data need to store in both the tabular and spatial formats. The water resources data management and warehouse system is a web-enabled application that permits spatial data to be stored with tabular data in a standard database management system. This system permits a dynamic generation of output from the tabular and spatial data and enables users to generate answers to their queries online, rather than simply presenting static maps and tables from the database. The WRDC applications were developed and chosen by gathering the ideas suggested by users at the ministerial, provincial and river basin levels. Within the resulting inventory system, information was grouped into irrigation scheme system; water resources potential; natural disaster; hydrological data and station networks; and other information. For the users at the ministerial level access the system by using local area network (LAN) connections and other users at the provincial and river basin levels or elsewhere in the world can use the internet for connections and regular browser software for system operation.