A virtual electronic pet and a pet-type robot that changes emotional state and instinct state according to surrounding information and internal information. The electronic pet behaves according to the emotional state and the instinct state. Transmission/reception of the internal state of the electronic pet (pet characteristic information) is made possible among the virtual electronic pet, the pet-type robot, and a personal computer. Thus, the action of the electronic pet is implemented by each device in accordance with the internal state of the electronic pet affected by other equipment.