The present disclosure relates to a communication technique for combining a 5G communication system with IoT technology to support a higher data transmission rate than a 4G system, and a system thereof. The present disclosure can be applied to 5G communication and IoT related technology-based intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail business, security and safety related services, etc.). The present invention relates to a method and apparatus for a first network device in a wireless communication network to control traffic of a terminal, and the method of the present invention comprises the steps of: a first network device detecting a first flow in a second network device connected to the first network device after a particular point of time; confirming whether the detected first flow is associated with a first terminal connected to the second network device after the point of time; and controlling traffic for the flow of the terminal on the basis of the confirmation result.