A service server comprising: a database for registering a voice message; an access information issuing device which issues access information required for inputting the voice message from a user terminal through a network; a print instructing device which sends the access information to a printer along with a given picture to cause the printer to print the access information and the picture on the same print medium; an access information input device in which access information obtained on a user terminal is inputted from the user terminal through the network on the basis of the print medium; a voice message input device in which a voice message is inputted through the network from a user terminal sending the access information; a voice message registration device which registers the voice message inputted from the user terminal sending the access information in the database in association with the access information; and a voice message output device which outputs the voice message registered in the data base in association with the access information.