A non-transitory computer-readable recording medium stores a design document management program causing a computer to execute a process including: acquiring a plurality of design documents about a system; identifying a plurality of label items representing elements of the system based on appearance frequency information of character strings included in the plurality of design documents acquired; and generating structure information in which the plurality of label items are hierarchized based on appearance positions at which the character string corresponding to each of the plurality of label items identified appears in the plurality of design documents.