The disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as long term evolution (LTE). The disclosure relates to a transmission device and method for adjustment of a signal beam by using a lens in wireless communication system, and includes a transmitter configured to form a beam by applying a predefined phase value pattern to a signal transmitted through an antenna array, the antenna array configured to emit the beam, and a lens having a phase mask corresponding to the phase value pattern, and configured to adjust a gain of the beam emitted from the antenna array. Accordingly, the transmission device and method can reduce a distance between an antenna and a lens in a wireless communication system.