Earthquake monitoring system of China has experienced the innovation of digitalization,cyberization and automation. With the expansion of earthquake monitoring station and network,China Earthquake Networks Center(CENC),as the national earthquake data center,is facing serious pressure of processing and storing data from tens of thousands of earthquake monitoring stations. This paper mainly focuses on the key points in constructing the distributed storage system based on experiences from Earthquake Early Warning Project and Public Security Information Project(CEA subproject),and trying to demonstrate its advantage and rationality. This paper also analyzes the service capacity of shared server system with the case example of history data transfer and archive business. The results of this paper will provide further reference for the storage and management of mass earthquake data efficiently and the construction of shared data storage systems in different departments.