This research integrates various governmental databases of social welfare to design a system-architecture of data warehousing for social welfare in Taiwan. The proposed architecture is used as the foundation to deploy the data warehouses for social welfare of the Hsin-Chu city government. Moreover, online analytical processing and data mining techniques are used to analyze varieties of social welfare information for decision support. The result provides important references and suggestions for decision makers in planning future welfare policies. Consequently, we expect the service quality of government can be upgraded. The research shows the vision of promoting our government to be "business oriented" and "service oriented" government