In a server (10), all column data items are extracted from a master data storage unit (11) and sent to a client (20) in addition to target data corresponding to a data acquisition request that has been sent from the client (20), and in the client (20), the target data and data items received from the server (10) are displayed on a screen in a user-interface selectable mode, thereby making it possible to download from the server (10) to the client (20) the minimum target data required when attempting to perform a desired process on the client (20), and doing away with the waste associated with downloading all the data. In addition, by also downloading and displaying in a selectable manner on a screen data items pertaining to data other than the target data, a user can be shown, in an operable-like manner, data items pertaining to actual data without downloading the actual data.