An air conditioning controller that operates an air conditioner, the air conditioning controller comprising: a storage component in which are stored operation explanation data (D42a) that explain operations of functions executed in the air conditioner, relationship explanation data (D42b) that explain relationships between the explanations of the operations of the functions and values that are set, and setting display layout data that include a setting display region that displays values that are set and an explanation display region for displaying the operation explanation data and the relationship explanation data; a data receiving component (11u, 11d) that receives setting of numeric data; and a display component (75, 70) that causes numeric data that the data receiving component (11u, 11d) has received to be displayed in the setting display region while causing the operation explanation data (D42a) and the relationship explanation data (D42b) to be displayed in the explanation display region in accordance with the setting display layout data, characterized in that the setting display layout data include a plurality of the setting display regions, a plurality of the relationship explanation data (D42b) are indicated in each of the setting display regions, and the display component (75, 70) causes a plurality of numeric data that the data receiving component (11u, 11d) has received to be displayed in each of the corresponding setting display regions while causing the operation explanation data (D42a) and the plurality of the relationship explanation data (D42b) to be displayed in the explanation display region in accordance with the setting display layout data. a storage component in which are stored operation explanation data (D42a) that explain operations of functions executed in the air conditioner, relationship explanation data (D42b) that explain relationships between the explanations of the operations of the functions and values that are set, and setting display layout data that include a setting display region that displays values that are set and an explanation display region for displaying the operation explanation data and the relationship explanation data; a data receiving component (11u, 11d) that receives setting of numeric data; and a display component (75, 70) that causes numeric data that the data receiving component (11u, 11d) has received to be displayed in the setting display region while causing the operation explanation data (D42a) and the relationship explanation data (D42b) to be displayed in the explanation display region in accordance with the setting display layout data, characterized in that the setting display layout data include a plurality of the setting display regions, a plurality of the relationship explanation data (D42b) are indicated in each of the setting display regions, and the display component (75, 70) causes a plurality of numeric data that the data receiving component (11u, 11d) has received to be displayed in each of the corresponding setting display regions while causing the operation explanation data (D42a) and the plurality of the relationship explanation data (D42b) to be displayed in the explanation display region in accordance with the setting display layout data.