Analysis for the need that should be resolved in developing new geographic information system more deeper study and analysis for cluster techniques and Oracle Real Application Cluster （RAC） were taken. To meet special requirement for current management of massive spatial data on net

an optimal multi-level PC servers architecture in GIS with clustering techniques was designed to take full advantages of high performance computing

high reliability and other cluster features. Integrated the reliability

scalability

flexibility and other features of RAC with general spatial database management strategies such as spatial index and partition

remote in-line procedures

mutual-backup of two computers and other strategies

a new type of distributed data management techniques such as high spatial locating

multi-caches strategies cluster based were developed. An application with RAC Servers and Oracle9i application servers （iAs） was tested

which showed the high performance of whole spatial database managing platform

such as high usability

load balance

high data downloading and high efficient spatial data query and anlysis.