Abstract: In order to ensure the continuous and reliable observation data of seismic stations, improve the operation rate of seismic stations, it is very important for the earthquake monitoring center station to take charge of the operation and maintenance of the instruments and network in its area. In this paper, the station uses VPN link to configure parameter router, which can not communicate with the provincial agency for data transmission fault case analysis and disposal. The basic working idea of finding this kind of fault is expounded. Combining with experience in actual work, some points for attention in instrument operation and maintenance at the center station are also put forward.