Abstract: Digital mine is a complex system engineering. To solve the problems of data sharing and interoperability and to break down the information silos, a service-oriented web digital mine system is put forward. The service-oriented architecture of the system and the web service as the basic way to implement the system architecture are discussed. With the 3D geological body modeling in combination with visualization and attribute inquiring for the architecture a practise was advanced, the results showed that it is feasible to build a distributed web digital mine system based on SOA, and that the service-oriented web digital mine system can integrate all of the sub-systems of different departments in an enterprise. SOA is also proved of high expansibility and maintainability, thus making it applicable to be used widely in the future.