Based on information on a tracking target, a tracking target detecting unit is configured to detect the tracking target from an image captured by an automatic tracking camera. An influencing factor detecting unit is configured to detect an influencing factor that influences the amount of movement of the tracking target and set an influence degree, based on information on the influencing factor. Based on the influence degree set by the influencing factor detecting unit and a past movement amount of the tracking target, an adjustment amount calculating unit is configured to calculate an imaging direction adjustment amount for the automatic tracking camera.