Earthquake information network system of Jiangsu province is a unified platform of regional seismic data transmission, data exchange, and data storage and information service. Aiming at the existing problems of the network system, an updating scheme is put forward. There are mainly: to physically separate the transmission system and Internet by GAP, to upgrade the key equipment and links bandwidth of the network, to increase network security equipment. Through those technical means, the network system achieves a safe, stable operation target, both to satisfy the needs of the information and data transmission, exchange, storage and diversified applications of seismic, and to meet the requirements of three level safety management of information system. The scheme can provide a useful reference for optimizing the seismic information network system.