1. A method of providing information in a first device, the method comprising: obtaining identification information regarding at least one object included in an image displayed on the first device; receiving a user input to select an object from among the at least one object included in the image displayed on the first device; obtaining relationship information which represents a relationship between a user of the first device and the selected at least one object based on the identification information of the at least one selected object; obtaining recommendation information about the object based on the relationship information; outputting the relationship information to at least one of the first device and a second device of the at least one selected object; and outputting the recommendation information to at least one of the first device and the second device.