An object linkage system including: a database that stores objects and a linkage map; a unit for extracting an already-registered object to be linked with a new object from already-registered objects and copying a first linkage attribute value of the already-registered object to the new object as a second linkage attribute value of the new object; a unit for registering the new object into the linkage map by associating the new object with an identification value which identifies an object set which contains objects having the second linkage attribute value in common; and a unit for receiving a linkage request from a user terminal, obtaining an object set from the linkage map, and launching creation systems for operating element objects of the object set so as to enable the user terminal to browse the element objects.