A method for controlling a user terminal associated with a doorbell including a camera according to an embodiment of the present invention includes: storing, in a database, feature data units collected using the doorbell; generating one among a plurality of types of commands according to whether an object detected from an image of a visitor captured by the doorbell matches one of the feature data units; and displaying first and second graphic interfaces, which are different from each other, on the user terminal in responses to first and second commands, respectively, among the commands.