Headrest adjusting device and method

A headrest adjusting device and method, the headrest adjusting device comprising: a headrest body (1), the height of a region thereof being adjustable according to the posture of a sleeper; an inflation/deflation mechanism (2) connected to the headrest body (1) for adjusting the height of a region of the headrest body (1); a sensor (3) for collecting information about the sleeper and providing feedback; a central information processor (4) connected to the sensor (3) and the control end of the inflation/deflation mechanism (2) respectively for receiving information from the sensor (3) and sending an adjustment instruction to the control end of the inflation/deflation mechanism (2) according to the information and the body data of the sleeper. The headrest adjusting device and method ensure that a sleeper has the most natural and scientific sleep posture, and enable automatic adjustment of the head and neck of the sleeper in different sleep postures to allow the head to be in a proper position relative to the neck, thus providing the sleeper with deeper and longer sleep, improving sleep quality, and meeting the needs of the public.