In an information providing device and method, a plurality of information providers, including first and second information providers, are made to be associated with each other. The first information provider is caused to receive a first user information item, stored in a first information management unit, in response to a user information receiving request. The second information provider is caused to receive a second user information item, correlated with the first user information item and stored in a second information management unit, in response to a predetermined identification data. A unified information item is created by combining the first user information item and the second user information item based on the predetermined identification data is outputted.