A method of providing a service for sharing a printing environment using multiple service providing apparatuses connected via a network is disclosed. The method includes the steps of: (a) a first service providing apparatus managing service data including data on the hierarchical relationship between the first service providing apparatus and second and third service providing apparatuses connected thereto; and (b) the first service providing apparatus transferring information and/or data on printing reservation to the second service providing apparatus in response to a request from the third service providing apparatus.