Abstract: Big data has been a new IT hot word after cloud computing and internet of things and it connects everyone’s life. Geological data includes basic geology, mine, geophysics and geochemistry. All of these data have significant application value for the nation and society. Combining the big data with geological data and service is worth investigating. The basic geological library was taken as an example in this paper to analyze the geological data management and present service and demand situation. Also the exploration of big data thinking, improvement of geological data management and service, realization of the efficient management and effectively extraction of data are considered in this research. This work gives a brief introduction of the great application value of geological data for whole society.