1. An image matching apparatus, comprising: a storage unit configured to store image data of one or more devices that are connected to the storage unit through a plurality of local networks; an obtaining unit configured to obtain image data of a device image obtained by a capturing device; a specification unit configured to specify one or more of the local networks to be used for image matching; and an image matching unit configured to perform image matching of the obtained image data against the stored image data of one or more devices that are connected to the specified one or more of the local networks.