The present invention relates to a system and a method for device pairing which can pair a plurality of terminals using a brightness value change pattern. The system for device pairing according to an embodiment of the present invention comprises: an apparatus including a display; n terminals; and a server for connecting the apparatus including the display with the n terminals. The server assigns an ID to the apparatus including the display in accordance with an access request of the apparatus. The apparatus including the display calculates a brightness value change pattern corresponding to the ID, and outputs the pattern on the display. The n terminals can identify the ID after detecting the pattern outputted on the display using a proximity sensor and an illuminance sensor, transmit the ID to the server, and request an access.