In order to picture the evolution of 3-D structure in a basin, it was necessary to compile a series of paleo-structural contour maps in varied epochs. The project of compiling paleo-structural contour map was a complex research process, in which the researchers might meet various conceptual and technical problems, and whole the process should be restricted by concept of "balance in geology". This paper discussed some key problems, such as how to select a logical model of deformation, how to restore the denuded thickness and distribution, how to restore displacement of faults, how to do de compaction correction and so on. An acceptable method should be as follows: an upper structure-contour map representing a definite geological epoch being restored to horizontal first, then to restore the geometry of the structural contour maps below the upper structure-contour map according to geological epoch under restriction of "balance in geology". To compile a reasonable paleo-structural contour map, it was necessary to have not only a series of high quality structural contour maps but also some important assistant maps and data, for example, profile sections of tectonic evolution, isopach map of erosion, table of de compaction correction and so on. The paleo-structural contour map restored by concept of "balance in geology" might be more reasonable to depict the 3-D structural geometry in the geological epochs than the map compiled by utilizing the thickness of relict strata.