We have established brand new Application Service Providers(ASP) for RTK positioning with new RTK．GPS technology using Japanese nation wide GPS network named GEONET tllat established by GSI(Geographical Survey Institute)． This service realized to provide centimeter accuracy RTK positioning using Virtual Reference Station(VRS)and our network based GPS receiver unit(NetSurv)。andit realizes easy to use RTK for Surveyor in all over Japan． This paper describes the concept of our Server based RTK platform and specialized GPS receiver unit,then explain Japanese Real Time GPS data streaming infrastructure which established by GSI and operate by JAS，then finally explain our unique ASP based RTK processing system by using all of techniques and infrastructure which explained the above．