Abstract: Gravimetric and magnetic data-base system (V98) is completely reformed from previous version. By using the new software-hardware platform, previous file format had been reformed, previous informations had been recalculated and conversionally had been stored, and 36Mb new data had been added. The system consistes of 17 2-D tables, 225 data termes, 2×10⁶ records, data of 70 Mb and 34 application modules for data processing. About the system, structure again was designed, all the system was constructed by menu and visual. As compared with previous version, data had been doubled, and inquiring is more convenient, data processing is more powerful and operation is more easily.