Abstract: With the exploration tasks becoming more and more difficult and the exploration information swelling rapidly, the current exploration data management is inadequate to meet the demand for exploration production and study. It is necessary to establish the exploration information system of Daqing Oil Field. Based on the investigation both at home and abroad and with the advanced information management technology and experience borrowed, the principle for the exploration information system has been formulated in the light of the actual condition of Daqing Oil Field. A three-level information system structure of ??specialized databank, central major databank and project databank?? is preliminarily shaped at the oil field and gradually perfected in the practice. The targets have been identified to perfect the information system, namely one main databank of exploration center at the level of oil field, five project databanks and seven specialized databanks. Establishment of the three-level exploration information system will provide important guarantee for technological study and raise the exploration efficiency. Meanwhile, establishment of digital oil (gas) reservoirs will inevitably reduce the exploration risk and boost the exploration performance.