The invention provides an ecologic bed. An ecologic environment simulator composed of a plasma generation module, a negative ion generation module, an ultrasonic atomizer, a low-noise bidirectional speed-adjustment fan, a humidity detection device is inlaid in a cavity chamber of a bed rack by a program control technique using mature and existing modules and the cavity chamber comprises a first hatch and a second hatch communicated with the outside air and an ecologic negative ion exit is above the human sleeping-gesture head position by a proper height and an angle-adjustment ecologic negative ion exit covers the head respiratory region and the head respiratory region generates the ecologic environment composed of negative ion, ultrasonic atomization water molecule and natural wind, verybeneficial for health sleep. A program controller controls a carbon fiber brush for performing the ion disinfection and deodorization function and emitting the blast air dry-cleaning negative ion andthe self-cleaning function of wet-cleaning the air filter net.