The present invention provides a service processing system that process a service for performing predetermined linkage processing on document data among plural devices connected to a network according to predetermined processing contents. A log generating unit of the service processors generates logs of processing results in the respective service processors. Logs stored in the service processors are received by the log receiving unit of a linkage processing server, whether processing results of service linkage are normal or not is determined by comparing the processing results by a log comparison determination unit, and comparison result data as processing result logs is generated in a comparison determination result generating unit. The comparison result data is transmitted to a client terminal making a request to transmit linkage processing results.