A light controller is provided in the present invention. The light controller for adjusting a plurality of lights in a space, including a body having a slot, a touch interface and a control module; a spatial information map replaceably contained in the slot and schematically showing an information in the space; a touch interface configured on the body corresponding to the spatial information map and receiving a touch input; and a control module electrically connected with the touch interface and the plurality of lights and setting a controlled relationship on the touch interface with respect to each of the plurality of lights in accordance with the information shown by the spatial information map.