A smart pillow to avoid neck pain and pressure sores and promote healthy sleep includes a body, a processing unit, a plurality of pressure sensors, and a plurality of air bags. The pressure sensors and the air bags are mounted in the body. Each air bag includes a bi-directional valve. The pressure sensors can detect values of pressure on the body and thus the body of a user, and transmit the detected pressure values to the processing unit. The processing unit can control the bi-directional valves of the air bags in accordance with the received pressure values to adjust air amounts of each of the air bags by indrawing or releasing air. The smart pillow guides and supports a user's neck.
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