Disclosed are an electronic device and a method for controlling an electronic device. The electronic device comprises an application processor, a network processor, a control unit connected to a companion device, and a communication unit for transmitting/receiving data to/from the companion device, wherein the application processor makes a request for connection with the companion device to the network processor and the network processor connects the companion device to the application processor having made the request for the connection when receiving the request for the connection from the companion device.