The disclosure relates to a communication technique for convergence between an IoT technology and a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system thereof. The disclosure may be applied to intelligence services (e.g., smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety related services, etc.) according to a 5G communication system and an IoT related technology. In addition, the disclosure provides a method and an apparatus for controlling power of an IAB node in a wireless communication system.