A wireless device comprising: a display; a wireless communication interface configured to wirelessly perform communication with an external device; and a processor configured to: activate any one of a first connection mode in which connection with the external device is established through an access point or a second connection mode in which direct connection with the external device is established, based on a network environment information, wherein the network environment information includes at least one of a connection frequency band, a frequency bandwidth, a received signal strength indication (RSSI), or response packet loss information of the access point and receive, from the external device, image data corresponding to a source image being displayed on the external device according to the activated connection mode and display, on the display, a mirroring image based on the received image data, characterized in that the processor is further configured to: increase a playback speed of a mirroring image corresponding to the received image data to a double speed for a predetermined period after the first connection mode is switched to the second connection mode. a display; a wireless communication interface configured to wirelessly perform communication with an external device; and a processor configured to: activate any one of a first connection mode in which connection with the external device is established through an access point or a second connection mode in which direct connection with the external device is established, based on a network environment information, wherein the network environment information includes at least one of a connection frequency band, a frequency bandwidth, a received signal strength indication (RSSI), or response packet loss information of the access point and receive, from the external device, image data corresponding to a source image being displayed on the external device according to the activated connection mode and display, on the display, a mirroring image based on the received image data, characterized in that the processor is further configured to: increase a playback speed of a mirroring image corresponding to the received image data to a double speed for a predetermined period after the first connection mode is switched to the second connection mode. activate any one of a first connection mode in which connection with the external device is established through an access point or a second connection mode in which direct connection with the external device is established, based on a network environment information, wherein the network environment information includes at least one of a connection frequency band, a frequency bandwidth, a received signal strength indication (RSSI), or response packet loss information of the access point and receive, from the external device, image data corresponding to a source image being displayed on the external device according to the activated connection mode and display, on the display, a mirroring image based on the received image data, characterized in that the processor is further configured to: increase a playback speed of a mirroring image corresponding to the received image data to a double speed for a predetermined period after the first connection mode is switched to the second connection mode.