To provide a chat system capable of changing a connection destination to a further appropriate chat bot server device even when a chart service is being offered.SOLUTION: A chat system comprises a chat bot ID management unit, a chat bot ID reception unit, and a change unit. The chat bot ID management unit stores field data in association with chat bot IDs for identifying chat bot server devices. The chat bot ID reception unit acquires a chat bod ID obtained by referencing the chat bot ID management unit on the basis of field data output from a field data inference unit in response to question data transmitted from a terminal device side. The change unit has a function which can change a chat bot server device to which the question data is transmitted by a terminal device on the basis of the chat bot ID acquired by the chat bot ID reception unit.SELECTED DRAWING: Figure 1
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