Various embodiments of the present invention disclose a method and device, the device including: an antenna module; an interface for delivery using a protocol for transmission; a memory; and a processor, wherein the processor is set to: determine antenna information for each beam index on the basis of a transmission beam that can be generated in the antenna module; generate beam book information on the basis of the determined antenna information; and transmit the beam book information and device connection information, related to an electronic device present inside the coverage of a base station, to an external server through the interface. Various embodiments are possible.