In this paper, using comparative method, we　analyse the data integrity and data accuracy　of Inner Mongolia Seismic network(1976 to 2011), including the datas of fixed stations, hohhot networks and the mobile station. Statistics results show that, seismic monitoring data integrity rate rise from 7.4% to 96.3%, and the average increase was 88.9%. According to the '15' unified national cataloging data format, we unified the various stages earthquake catalog format and observational report format, which Guarantee the data unity and coherence.