As the birthrate decreases, the labor shortage of young generation becomes social problem. In order to solve this problem, it is necessary to establish the social surroundings in which parents with the infant are able to work feeling easy. Then, the author has been proposed the system giving peace of mind to the infant in the nursery by transmitting the heartbeat rhythm of the working parent through the Internet and reproducing it in the doll held by the infant, and giving peace of mind to the parent by transmitting the heartbeat rhythm of the infant and reproducing it by the portable heartbeat simulator like a wrist watch. In this study, the evaluation experiments are carried out to confirm the followings : the infant shows good reaction in the heartbeat rhythm of the mother, and the mother is able to recognize the infant heartbeat rhythm by the portable heartbeat simulator. As the result, it is clarified that the proposed system has the ability of giving peace of mind to both of infant and parent.
