User interface design is the most important and active part for an application system to display its practicability. As grid fault information system is concerned， the characteristic of its user interface design is to analyze the information during the ongoing processing of gradually data acquisition and information integrating. The key issues lie in the process description of data availability， correlated utilization， reasoning and associating， and the information section making， which means adopting information integration methodology utilizing the correlation inherited in database design， information searching， graphic display， reporting， embedded comprehensive application module， etc. It is highly recommended to use Java based Web service technology and WWW page based interface design as the user interface solution because of their advantages of easy display and capability of utilizing the achievement of any third developer or independent module through linkage， embedded integration or remote method invocation.