This invention enables realization of an electronic pet with more reality using various types of devices. Specifically, a virtual electronic pet 202 and a pet-type robot 204 change the state of the emotion and the state of the instinct as the internal state of the electronic pet (information included in pet characteristic information 203) in accordance with surrounding information and internal information, and act in accordance with the state of the emotion and the state of the instinct. Transmission/reception of the internal state of the electronic pet (pet characteristic information 203) is made possible among the virtual electronic pet 202, the pet-type robot 204, and a personal computer 201. Thus, the action of the electronic pet is implemented by each device in accordance with the internal state of the electronic pet changed by another equipment. <IMAGE>
ELECTRONIC PET SYSTEM, NETWORK SYSTEM, ROBOT, AND STORAGE MEDIUM