Abstract: In the tradition,the region open country geology disaster investigation mainly uses tools to complete in the open country.In the future,if the specialist want to gain primary data about the disaster,they need data from material cabinets to reorganize and analyze them.This kind of working pattern will not favor data sharing and the management.Also will not adapt the construction rhythm of "the digital national territory" project.Therefore,based on the 3S technology,to establish a set of geological disaster open country investigation numeral gathering system integrating open country numeral gathering,producing chart,the analysis and the data output integration is the key to solve above question.This paper begins from the demand analysis,and to the system construction carries on discussion research from several aspects such as system constitution,field data gathering model,entity model and system function.Finally,uniting the design and using domestic product embedded GIS software MAPGIS,has realized a set of geological disaster open country investigation numeral gathering system integrating the fiele data organization,issuing gathered background document,collecting gathered data integration.