The present invention is related to a smile triggered device (1) for encouraging people to smile, the smile triggered device (1) comprising, a frame (2); a mirror (3) having at least one reflecting surface and installed into the frame (2); a switchable material (4) which can be switched to transparent or non-transparent state and covered on the reflecting surface of the mirror (3); a camera (5) capturing images of the user; a control unit (6) connected to the camera (5) and adapted to processes facial expressions of the user in real time for detecting whether the user smile or not, wherein the control unit (6) changing the state of the switchable material (4) to the transparent state by applying voltage thereto if a smile detected. The mirror (4) function of the smile triggered device (1) is maintained until the user changes his facial expression.