The invention discloses an intelligent humidifier for an office. The intelligent humidifier for the office comprises a base and a box, wherein the base is provided with a mounting groove and a battery; an ultrasonic atomizer is arranged in the mounting groove; and the box is separately mounted in the mounting groove and is placed on the ultrasonic atomizer. When the box is placed on the ultrasonic atomizer during use of the intelligent humidifier for the office, pressure heads at the bottom of the box are exactly pressed into switch grooves and can press pressure plates, and after the pressure plates are pressed downwards, upper contacts on the pressure plates are matched with lower contacts in the switch grooves, so that a battery and the ultrasonic atomizer form a power loop, the ultrasonic atomizer is started to atomize water in the box, atomized water mist is discharged from mist holes to realize humidifying; after water in the box is gradually atomized, the weight of the box can be reduced; and when a spring force is greater than the weight of the water in the box, springs can jack up the box, the upper contacts are disconnected from the lower contacts, and then the ultrasonic atomizer is closed automatically.