Aiming at the problems of tedious steps, low efficiency, and long working cycle of traditional field geological data acquisition and digitization, a geological data field acquisition system based on World Wind mobile terminal is developed, which integrates World Wind map technology, network communication technology, multi-thread technology, and data storage technology. The realization methods of positioning module, data input module, solid projection module, and three-dimensional display module are mainly expounded. The research and development of this system realizes the information collection, browsing and display of field geological work, provides convenient data entry mode for geological workers, promoting the digitalization, informatization, and modernization of geological and mining work.