Abstract: View of the complexity, inefficiency of calculation, untimely submission of data and singleness of achievement display of the conventional method of metro shield tunnel segment attitude measurement, starting with improving the method of field measurement data collection, the mathematical model of segment attitude deviation calculation of segment attitude detection information system is described in detail. System structure and application effect are explained. Segment attitude detection information system can realize automation, real-time, standardization and specialization of segment attitude detection for shield tunnel. The system can improve the quality of tunnel axis control and can save the cost of metro tunnel construction.