Abstract: The Web-based Reporting is becoming the mainstream of reporting application in enterprise information systems. At present most of the reporting tools are limited within two-tier client/server applications, and do not support the Intranet/Internet reporting development, and also they are difficult to use and develop with. On the basis of the analysis of latest Web database integration technologies, the scheme of a component-based Web reporting tool is brought out, with emphasis on some key technologies, such as the communication mechanism between client and server, database access interface policy, XML-based communication package design, which is helpful in the reporting development of enterprise information systems.