A method executed by a server to provide a mobile device with relevant information about an object in a captured image received from an image reproducing device, the method including: receiving, from the image reproducing device, an image captured by the image reproducing device; receiving, from the mobile device, information corresponding to an application usage history of the mobile device; searching, based on the application usage history, for the relevant information about the object in the captured image; and transmitting to the mobile device the relevant information found based on the searching.