Disclosed is a method and an apparatus for a first device to perform authentication by using Bluetooth LE (Low Energy). The present invention provides a method and an apparatus comprising exchanging capability information with a second device; generating a random code for first authentication through a user authentication service based on the capability information; transmitting a write request message including the generated random code to the second device; receiving a write response message in response to the write request message from the second device; receiving an authentication indication message from the second device, wherein the authentication indication message includes state information indicating success or failure of the first authentication based on the random code; and transmitting an authentication complete message in response to the authentication indication message.