A smart bath mirror, comprising a mirror face (1) and edge covering plates (2); a top end of the mirror face (1) is provided with a functional box (3), wherein the functional box (3) is externally provided with an illuminance sensor (301) and an infrared sensor (302), and the functional box (3) is internally provided with an inclined plate assembly (303), a piston (304), a telescopic light-emitting plate (305) and a controller (308); the inclined plate assembly (303) comprises a first inclined plate (3031) and a second inclined plate (3032); the telescopic light-emitting plate (305) comprises a first light-emitting plate (3051) and a second light-emitting plate (3052) that may telescopically slide along the first light-emitting plate (3051), a tail end of the first light-emitting plate (3051) is slidably connected to the first inclined plate (3031), and a tail end of the second light-emitting plate (3052) is slidably connected to the second inclined plate (3032); the first light-emitting plate (3051) and a top part of the functional box (3) are connected by means of the piston (304); the inclined plate assembly (303) and a bottom part of the functional box (3) are provided therebetween with trigger switches (306), and the bottom part of the functional box (3) is provided with a sealed cover (307); when a detection value of the illuminance sensor (301) is lower than a threshold and the infrared sensor (302) senses that a moving object is present in front of the mirror face (1), the piston (304) is controlled to elongate; and when the trigger switches (306) are triggered, the sealed cover (307) is controlled to open and the telescopic light-emitting plate (305) is simultaneously controlled to illuminate, which is thus a safe and effective manner of illumination for a bath mirror device.
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