LED mood presenting and adjusting device and method

The invention discloses an LED mood presenting and adjusting device and method. The LED mood presenting and adjusting device includes a facial expression recognition module, a color judging module, a mood presenting module and a mood adjusting module which are connected in sequence, wherein he color judging module is connected with the mood adjusting module; the facial expression recognition module is used for recognizing facial expression of a user and calculating to obtain a happiness index A of the user; the color judging module performs table look-up according to the happiness index A to obtain a corresponding first light color and a changing curve thereof; the mood presenting module controls an LED lamp to change according to the first light color and the changing curve thereof, so as to present the current mood of the user; and at the same time, the color judging module performs table look-up to obtain second light colors whose corresponding happiness indexes are larger than A and changing curves of the second light colors, sends to the mood adjusting module, and the mood adjusting module controls color and brightness changes of the LED lamp according to the second light colors and the changing curves thereof, so as to adjust or pacify the mood of the user.