Abstract: Information system is an important tool of realizing informatization,how to find and resolve the faults of information system connection to achieve interconnection is pretty important.This paper developed an Android App of faults querying for information system based on Android Studio combining relation database and expert system.The “information system faults database” is established by SQLite database,not only can support for users to diagnose faults,but also become a collecting platform of faults database.The App of faults querying has good portability and friendly operation interface,it can largely improve the efficiency of solving the faults,and it is of great significance in maintaining the stability of information system.

Key words: Information system,Android,Faults query,Diagnose