A system for controlling a device in at least one predetermined spatial region, the device in the predetermined spatial region comprising one or more air terminal devices of a Heating Ventilation Air Conditioning (HVAC) system mounted in the predetermined spatial region, the system comprising: a living organism statistical system for a predetermined spatial region, comprising: a Bluetooth module that can be carried by a living organism and configured to broadcast a Bluetooth signal; a living organism statistical device, which can be mounted in a predetermined spatial region, wherein the living organism statistical device is configured to receive Bluetooth signals of Bluetooth modules carried by living organisms and obtain quantity information of living organisms in the predetermined spatial region based on the received Bluetooth signals, the living organism statistical device comprising: a Bluetooth communication module configured to receive Bluetooth signals from one or more of the Bluetooth modules by scanning; a signal intensity determining module configured to determine signal intensity of each received Bluetooth signal and determine, based on the signal intensity, whether a corresponding Bluetooth module is located in the predetermined spatial region; and a calculating module configured to acquire, from the received Bluetooth signals, various types of feeling feedback information input from the Bluetooth modules and categorize, count and calculate the acquired feeling feedback information proportionally to acquire a first proportion value of each type of the feeling feedback information, and configured to acquire, from the received Bluetooth signals, various types of instructions input from the Bluetooth modules and categorize, count and calculate the acquired instructions proportionally to acquire a second proportion value of each type of the instructions; and an HVAC control management unit of the HVAC system; wherein the living organism statistical system is in communication connection with the HVAC control management unit, and the HVAC control management unit is configured to automatically control the one or more air terminal devices based on the quantity information and the first and second proportion values obtained by the living organism statistical system. a Bluetooth module that can be carried by a living organism and configured to broadcast a Bluetooth signal; a living organism statistical device, which can be mounted in a predetermined spatial region, wherein the living organism statistical device is configured to receive Bluetooth signals of Bluetooth modules carried by living organisms and obtain quantity information of living organisms in the predetermined spatial region based on the received Bluetooth signals, the living organism statistical device comprising: a Bluetooth communication module configured to receive Bluetooth signals from one or more of the Bluetooth modules by scanning; a signal intensity determining module configured to determine signal intensity of each received Bluetooth signal and determine, based on the signal intensity, whether a corresponding Bluetooth module is located in the predetermined spatial region; and a calculating module configured to acquire, from the received Bluetooth signals, various types of feeling feedback information input from the Bluetooth modules and categorize, count and calculate the acquired feeling feedback information proportionally to acquire a first proportion value of each type of the feeling feedback information, and configured to acquire, from the received Bluetooth signals, various types of instructions input from the Bluetooth modules and categorize, count and calculate the acquired instructions proportionally to acquire a second proportion value of each type of the instructions; and an HVAC control management unit of the HVAC system; wherein the living organism statistical system is in communication connection with the HVAC control management unit, and the HVAC control management unit is configured to automatically control the one or more air terminal devices based on the quantity information and the first and second proportion values obtained by the living organism statistical system. a Bluetooth communication module configured to receive Bluetooth signals from one or more of the Bluetooth modules by scanning; a signal intensity determining module configured to determine signal intensity of each received Bluetooth signal and determine, based on the signal intensity, whether a corresponding Bluetooth module is located in the predetermined spatial region; and a calculating module configured to acquire, from the received Bluetooth signals, various types of feeling feedback information input from the Bluetooth modules and categorize, count and calculate the acquired feeling feedback information proportionally to acquire a first proportion value of each type of the feeling feedback information, and configured to acquire, from the received Bluetooth signals, various types of instructions input from the Bluetooth modules and categorize, count and calculate the acquired instructions proportionally to acquire a second proportion value of each type of the instructions; and an HVAC control management unit of the HVAC system; wherein the living organism statistical system is in communication connection with the HVAC control management unit, and the HVAC control management unit is configured to automatically control the one or more air terminal devices based on the quantity information and the first and second proportion values obtained by the living organism statistical system.