The invention discloses a digital oil field comprehensive application system. The digital oil field comprehensive application system includes the following components of: a cache module used for caching data in a first database built by the system itself; an integrated data module used for reading data from a second database through a data service bus; a platform data module used for storing system data of a storage system; a new development service module used for reading data from a data layer and writing data into the data layer, and carrying out data processing; an integrated service module used for reading data from existing N target systems and carrying out data processing, wherein N is a positive integer; a new function development module used for providing list making, query, report and application customization functions and transmitting service requests to the new development service module through an enterprise server bus; and an integrated function module used for providing report and list making and query functions and transmitting service requests to the existing N target systems through the enterprise server bus. With the digital oil field comprehensive application system provided by the above technical schemes of the invention adopted, the technical problem of incapability of realizing trans-disciplinary and trans-department data comprehensive application in the prior art can be solved.