An operating method for a mobile terminal, according to one embodiment of the present disclosure, comprises the steps of: executing a signage application for providing a digital signage service; accessing a server according to the execution of the signage application; receiving information on the digital signage service from the accessed server; and displaying a main screen for managing a digital signage device on the basis of the received information, wherein the main screen includes approval state information for providing approval states of a plurality of items and error state information of one or more digital signage devices managed by the server.