1. A searching apparatus comprising: a storage unit configured to store therein indexes for searching for an object included in an image and cooperative information indicating a function of cooperating with the object in association with each other; a receiving unit configured to receive a captured image; an extracting unit configured to extract an object included in the captured image; a calculating unit configured to calculate a degree of similarity between the object searched for by an index stored in the storage unit and the object extracted from the captured image by the extracting unit; a searching unit configured to search for one or more objects based on the degree of similarity from the storage unit; and a presenting unit configured to present the cooperative information associated with the index corresponding to the object as a search result of the searching unit to a source of the captured image.