As it becomes normal for the PLA navy to sail to the open sea for training and the the multiple kinds of offshore military tasks it will face on the sea, the navy officers and soldiers will face more complicated health care problems, which brings greater challenges to the naval medical service support. In this review, we started from the problems in the medical service support; using the spatial analysis functions of geographic information system (GIS), and designed a naval medical service support GIS functional model, which included three functional modules:monitoring of the wounded and diseased, information management of naval medical service resource, and assistant decision-making for military medical service; and we also discussed the application of GIS in monitoring and early warning of the diseases, analysis and evaluation of risk factors, health resource allocation and decision-making support for health service.