1. A data transfer control device for synchronizing inputs to a first and a second database having different field definitions and outputs to an application process running on a user terminal, comprising: a session management device configured to issue a session key identifying said application process; a value transfer destination management device configured to specify at least one receipt data field in said first database as transfer destination for data input into at least one transfer data field in said second database, wherein the at least one transfer data field to be transferred is common to the first and second databases and has a different field definition than the at least one receipt data field in said first database the specified transfer destination to said application process together with said session key; a database management device configured to input the data input into the at least one transfer data field in said second database that is common to the first and second databases, wherein the data input is received from said application process together with said session key and updating said first database with the at least one receipt data field that is common to the first and second databases based on the specified transfer destination and based on the session key; and a data requested processing device configured to retrieve and output the data requested by said application process from said updated first database; wherein said session management device, when said session key is issued, inputs identifying information of said user terminal, and said value transfer destination management device retrieves from said first database a business object linked to the identifying information of the user terminal input by said session management device and a settings form indicating whether or not to display certain fields within said business object, and then specifies said transfer destination and outputs the business object and settings form together with said session key.