Even when a first moving condition is not satisfied, when it is determined that a second moving condition is satisfied and at the same time an object belongs to a first classification, an operation of a robot is controlled so as to prompt the object to move according to a first pattern or an arbitrary pattern. The second moving condition is a condition that the robot is capable of moving in according to a current target position trajectory without being obstructed by the object when the object is displaced according to the first pattern. The first classification is a classification of the object as an object capable of recognizing an action pattern of the robot and capable of moving autonomously.