Optimum beam display and guidance method and apparatus

The present invention relates to a method and an apparatus for displaying and guiding an optimum beam display. The present invention can be applied to 5G communication and Internet of Things (IoT) related technology-based intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail businesses, security and safety related services, etc.). A method for controlling a terminal according to an embodiment of the present invention may comprise the steps for: determining whether a center beam having the best antenna gain among a plurality of beams of a terminal is identical to a currently used beam of the terminal; calculating an angle between the currently used beam and the center beam of the terminal if the currently used beam and the center beam of the terminal are not identical; and outputting information indicating an optimal beam direction according to the angle between the currently used beam and the center beam of the terminal.