Considering the problems of the spatiotemporal information service of the satellite navigation augmentation system (SNAS) and greater needs from high-tech fields, we present network real-time kinematic (RTK) and precise point positioning real-time kinematic (PPP)–RTK positioning methods. We studied spatiotemporal information services and regulatory technology, and designed a SNAS service management platform that realizes the functions of regional spatial data dissemination based on SNAS and uses measurement monitoring, measurement locale setting, and historical trajectory analysis. From the results of the sample test and analysis, we established that users can directly receive high-precision network RTK services based on regional data. PPP-RTK accuracy tests were carried out using a car, and the test results show that the accuracy of determining the horizontal position and elevation was at the level of centimeters in an open environment, indicating that this method could provide reliable positioning services.