To provide a banking business support system, a method and a program for supporting performing right and efficient banking business.SOLUTION: A control section 21 of a support server 20 acquires external situation information, a financial transaction condition, customer situation information and a financial transaction situation of the same time from a back-end system 40; performs machine learning using teacher data having the acquired information as a data set; creates a customer behavior prediction model associating the financial transaction condition with the financial transaction situation; and calculates the financial transaction condition corresponding to a target value of a transaction situation using the customer behavior prediction model for a present external situation and a customer situation.SELECTED DRAWING: Figure 1
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