This paper comprehensively integrates the techniques of the Geographic Information System (GIS), the Decision Support System (DSS), SD, the Artificial Intelligence, distributed networks and spatial visualization based on the Enterprise Resource Planning (ERP) and the Market Information System (MKIS), We first proposed the concept of GBDS (GIS-based Business Decision System). We discuss the technological method of the GBDS serving for business management and decision making, which also benefits to extend the application of the GIS in social science especially in the field of commerce both in theory and practice.