Abstract: Covering all kinds of scientific data during oil exploration and production procedure, oil and gas exploration information system provides strong support for the management and objective decision. Restricted to limited data processing capacity, the system can only be used in the internal network environment. Then the core data generated by oil and gas exploration information systems is downloaded to the client, which is faced with risks of leaking sensitive data. Through in-depth study of the desktop cloud and its application, we integrate several application systems, such as oil and gas exploration information systems, OA, E-mail and so on, into one uniifed cloud platform, which not only tackles the remote application problems of numerous terminal equipments, but also improves the ability of protecting core data.