Abstract There is a great need for about 100 stations of the earthquake administration of Hubei province to transmit information by use of the wireless network system.Early,the homemade VPN network was used,by which the transmission velocity is much affected by internet,so the velocity was very slow,even we could not moniter the instruments in real time,could not often receive the data on time,and thus could not report the data to state station network center on time.At present,the business of the seismic network system of Hubei province has extended and it needs improving the data transmission network to cover the whole Hubei and to support the anmared precursor system,mobile seismometry system and mobile office system.Seeing that,the department of earthquake information network of Hubei province,after analyzing the geographic location of each brouch point and their demands,decided to constract the VPDN network system for monitoring the seismic data of Hubei province by use of the wireless VPDN of China Telecom.Thereby,the sofety of data transmission,reporting the observations in real time and the analysis and prediction of earthquake on time can be guaranted.