1. A presentation support system comprising: input means for inputting content data about an object to be presented and data indicating an intention of presentation, the object to be presented is a structure constituted by coupling a plurality of components; means for sorting the components into components having the same movements, and generating the structure on the basis of data indicating an coupling order and data indicating a coupling form in units of sorts: analyzing means for analyzing the presentation intention to infer a casual relationship between events indicated by the content data of the object to be presented, thereby analyzing an object environment of presentation; presentation data storing means for storing an object for supplementarily explaining the object environment of presentation by using the object environment of presentation as an index; presentation data selecting means for selectively obtaining an object having he object environment of presentation analyzed by said analyzing means as an index from said presentation data storing means; and display means for displaying, when the content data about the object to be presented is to be displayed in the form of a graph, the object material selected by said presentation data selecting means in combination with the graph.