Provided is a method for displaying application data in a wireless communication system, the method including transmitting, by a first device, audio and video data out of application data executed by the first device to a second device in a Wireless Fidelity (Wi-Fi) Display (WFD) session, if the WFD session is established through discovery between the first device and the second device, transmitting, by the first device, text or Graphic User Interface (GUI) data related to the transmitted audio and video data, to the second device in a session that is different from the WFD session, and receiving, by the first device, a close command for the application data and sending a message comprising a set parameter for stopping display of the text or GUI data to the second device.