In order to break the restriction on the intelligent upgrading of manufacturing industry and realize intercommunication between heterogeneous systems and heterogeneous devices, a method from object meta-model to object oriented modeling in the field of intelligent manufacturing is proposed. This paper introduces the standard and method of intelligent information modeling in digital workshop, expounds the OPC UA information model in detail, and analyzes and studies the combination modeling of WebService architecture and UML in OPC UA. The results show that OPC UA can provide a good implementation framework. This method is feasible and practical.