Realtime data acquisition and process is a key issue for the design of the realtime detection system for crack of anvil of the cubic synthetic diamond press.After viability assessment, combining with the working environment, a realtime detection and process scheme based on the sound card of IPC was presented. Sensor signals was entered into IPC sound card through the signal conditioning circuit.The sound card driving program was realized by C++ to implement data acquisition and A/D conversion.Signal analysis and identification algorithms design were realized by the strong signal analysis ability and toolbox function of MATLAB,then they were encapsulated into COM component. The realtime signal analysis and process was accomplished with the multithread technology of C++ and OLE technology, and then alarm information was output. The scheme not only owns good realtime response,but also has certain model significance in other industrial applications. 