A method for printing a repositionable note by a server includes creating a chat room in response to a request of a chief client, creating a two-dimensional code including link information to enter the chat room, a password to enter the chat room, and information about time when the two-dimensional code is created, transmitting the two-dimensional code to the chief client, receiving the password and the time when the two-dimensional code is created from one or more participant clients, allowing the one or more participant clients that have accessed the chat room using the link information obtained from a photographed image of the two-dimensional code to enter the chat room, and transmitting information about the one or more printers linked to the chief client in the chat room and information to link to the one or more printers to the one or more participant clients.