A long object management system for managing the history of the attribute data as well as the shape data constituting the temporal information of pipeline facilities, in which the future prediction is conducted by acquiring and managing the temporal information. The system comprises a unit for managing the time change data by the difference management of the pipeline shape and attribute data, and a unit for retrieving the time change data managed by difference, correcting the position using the result of retrieval and setting the correspondence between the time change data by correcting the data position.