A directionality control method for a directionality control system (10, 10A) which includes at least one imaging part that captures a video, and at least one sound collection part that collects sound, wherein the at least one sound collection part is provided as a separate body from the at least one imaging part, the method comprising: a step of displaying video data captured by the at least one imaging part on a screen; a step of receiving designation of any position in the video data displayed on the screen; and a step of computing a sound collection direction which is directed from the sound collection part toward a sound position corresponding to a designated position in the video data, wherein the sound collection direction which is directed from the sound collection part toward the sound position corresponding to the designated position in the video data is computed by using a predetermined sound collection direction computation parameter and a direction which is directed from the at least one imaging part toward the sound position corresponding to the designated position in the video data, characterized in that the sound collection direction computation parameter includes a first height (H C) from a reference surface to the at least one imaging part, a second height (H M) from the reference surface to the at least one sound collection part and a third height (H O) from the reference surface to a reference point in the direction of the optical axis of the at least one imaging part, and wherein the sound collection direction which is directed from the sound collection part toward the sound position corresponding to the designated position in the video data is computed based on setting a fourth height (H A) from the reference surface to the sound position corresponding to the designated position in the video data. a step of displaying video data captured by the at least one imaging part on a screen; a step of receiving designation of any position in the video data displayed on the screen; and a step of computing a sound collection direction which is directed from the sound collection part toward a sound position corresponding to a designated position in the video data, wherein the sound collection direction which is directed from the sound collection part toward the sound position corresponding to the designated position in the video data is computed by using a predetermined sound collection direction computation parameter and a direction which is directed from the at least one imaging part toward the sound position corresponding to the designated position in the video data, characterized in that the sound collection direction computation parameter includes a first height (H C) from a reference surface to the at least one imaging part, a second height (H M) from the reference surface to the at least one sound collection part and a third height (H O) from the reference surface to a reference point in the direction of the optical axis of the at least one imaging part, and wherein the sound collection direction which is directed from the sound collection part toward the sound position corresponding to the designated position in the video data is computed based on setting a fourth height (H A) from the reference surface to the sound position corresponding to the designated position in the video data.