A visualization system comprising: a receiver configured to receive an input of arrangement information indicating a location of an object image on a target area image (e) showing a target area; a storage configured to store correspondence information (221, 222) indicating the object image and information on an effect of an object shown by the object image on an air condition in association with each other; a controller configured to output information indicating an air condition of the target area based on the arrangement information on the object image and the correspondence information (221, 222); and a display configured to display at least one of information indicating the target area image (e) or the information indicating the air condition of the target area, the object including an air conditioner and a fixture, characterized by the arrangement information including floor surface information, fixture arrangement information, and air conditioner arrangement information and being input to the receiver by an operator, the target area image (e) indicating an image obtained by floor surface information, the object image showing the fixture or the air conditioner, the correspondence information (221, 222) including first correspondence information and second correspondence information, the first correspondence information indicates a fixture image (x) in association with effect information regarding air condition of the fixture shown by the fixture image (x), the second correspondence information indicates an air conditioner image (y) in association with effect information regarding air condition of the air conditioner shown by the air conditioner image (y), the effect information on an effect of the air conditioner on the air condition including information on an air conditioning capacity of the air conditioner, the receiver receiving an input of the size information on the size of the target area, the controller outputting the information indicating the air condition of the target area based on an air volume of the air conditioner corresponding to the air conditioning capacity of the air conditioner, and outputting the air condition in the target area based on the air volume of the air conditioner. a receiver configured to receive an input of arrangement information indicating a location of an object image on a target area image (e) showing a target area; a storage configured to store correspondence information (221, 222) indicating the object image and information on an effect of an object shown by the object image on an air condition in association with each other; a controller configured to output information indicating an air condition of the target area based on the arrangement information on the object image and the correspondence information (221, 222); and a display configured to display at least one of information indicating the target area image (e) or the information indicating the air condition of the target area, the object including an air conditioner and a fixture, characterized by the arrangement information including floor surface information, fixture arrangement information, and air conditioner arrangement information and being input to the receiver by an operator, the target area image (e) indicating an image obtained by floor surface information, the object image showing the fixture or the air conditioner, the correspondence information (221, 222) including first correspondence information and second correspondence information, the first correspondence information indicates a fixture image (x) in association with effect information regarding air condition of the fixture shown by the fixture image (x), the second correspondence information indicates an air conditioner image (y) in association with effect information regarding air condition of the air conditioner shown by the air conditioner image (y), the effect information on an effect of the air conditioner on the air condition including information on an air conditioning capacity of the air conditioner, the receiver receiving an input of the size information on the size of the target area, the controller outputting the information indicating the air condition of the target area based on an air volume of the air conditioner corresponding to the air conditioning capacity of the air conditioner, and outputting the air condition in the target area based on the air volume of the air conditioner.