The invention relates to a method for testing and/or monitoring the air quality in an operating room (100) with an operating table (110) arranged in it. In order to achieve conclusions about the air quality with simple measures it is suggested that at least one measured value recorder (118, 120, 122, 123) is arranged in, on and/or in the range of the operating table by means of which the air quality of the air is measured in the area of the operating table and during the activities.