The present invention relates to device control for a predetermined area of space and belongs to the technical field of intelligent control of devices. A control system provided by the present invention comprises: a sensing component installed in the predetermined area of space and used for sensing the predetermined area of space to at least determine density information of living beings in the predetermined area of space, and an HVAC control and management unit of an HVAC system, wherein the sensing component is interactively connected with the HVAC control and management unit in a wireless communication mode, and the HVAC control and management unit is configured to control one or more air end devices at least based on the determined density information of living beings.