A control device that controls a plurality of air-conditioning devices that are installed at different locations in a specified living space, comprising: a portable terminal location calculator, configured to calculate a location of a portable terminal inside the living space based on: distances to the portable terminal that are acquired through wireless communications with the portable terminal by each of a plurality of wireless adapters installed at different locations in the living space; and installation location information for each of the wireless adapters, the portable terminal including sensors for detecting environmental information related to air conditioning; a related device identifier, configured to, based on the location of the portable terminal that is calculated by the portable terminal location calculator and installation location information for each of the air-conditioning devices, identify from among the plurality of air-conditioning devices, a related device that has an influence on an environment surrounding the portable terminal; a target value corrector, configured to correct a target value for environmental information that is used in environment control of the related device; a control executor, configured to control the related device based on the target value that is corrected by the target value corrector, the control device being characterized in that the corrected target value is based on a difference between environmental information detected by the related device identified by the related device identifier and environmental information that is detected by the sensors of the portable terminal and further characterized in that the control device further comprises a memory, configured to store image data for a floor plan of the living space, installation location information for each of the air-conditioning devices in the image data, and installation location information for each of the wireless adapters in the image data; a display device, configured to display an image of the floor plan based on the image data; and an input device, configured to input the installation location information for each of the air-conditioning devices and the installation location information for each of the wireless adapters based on operation input; wherein the portable terminal location calculator is further configured to convert the location of the portable terminal in the living space to a location in the image data; and the related device identifier is configured to further identify the related device based on the location of the portable terminal that is converted to the location in the image data. a portable terminal location calculator, configured to calculate a location of a portable terminal inside the living space based on: distances to the portable terminal that are acquired through wireless communications with the portable terminal by each of a plurality of wireless adapters installed at different locations in the living space; and installation location information for each of the wireless adapters, the portable terminal including sensors for detecting environmental information related to air conditioning; a related device identifier, configured to, based on the location of the portable terminal that is calculated by the portable terminal location calculator and installation location information for each of the air-conditioning devices, identify from among the plurality of air-conditioning devices, a related device that has an influence on an environment surrounding the portable terminal; a target value corrector, configured to correct a target value for environmental information that is used in environment control of the related device; a control executor, configured to control the related device based on the target value that is corrected by the target value corrector, a memory, configured to store image data for a floor plan of the living space, installation location information for each of the air-conditioning devices in the image data, and installation location information for each of the wireless adapters in the image data; a display device, configured to display an image of the floor plan based on the image data; and an input device, configured to input the installation location information for each of the air-conditioning devices and the installation location information for each of the wireless adapters based on operation input; wherein the portable terminal location calculator is further configured to convert the location of the portable terminal in the living space to a location in the image data; and the related device identifier is configured to further identify the related device based on the location of the portable terminal that is converted to the location in the image data.