A humidity control system includes three dehumidifiers. Each of the dehumidifiers alternately switches between first batch operation in which air whose moisture has been adsorbed in a first adsorption component is supplied to a room and air heated in a heat exchanger is exhausted to outside the room through a second adsorption component, and second batch operation in which air whose moisture has been adsorbed in the second adsorption component is supplied to the room and air heated in the heat exchanger is exhausted to outside the room through the first adsorption component. The system further includes: a controller allowing the switchings of the dehumidifiers to be performed at different timings; and a chamber collecting air to be supplied from the dehumidifiers to the room.