The present invention achieves automation of validation of a catalog created by a cooperative service catalog creator through a GUI. A catalog verification device 60 is a catalog verification device 60 that verifies the catalog created by the catalog creation assistance system that assists creation of the catalog used in the orchestrator 50. The catalog verification device 60 includes a BG cooperation function unit 61 that is a function unit for communicating with a catalog creation device 40 included in the catalog creation assistance system, and a catalog verification function unit 62 that verifies the catalog created by the catalog creation assistance system based on information acquired by the BG cooperation function unit 61, in which validation of the catalog is performed from perspectives of a mandatory check, a syntax check, and sequence of rules for cooperation among services by performing syntactic analysis of a file when the cooperative service catalog is created by and stored in the catalog creation assistance system.