An information processing device includes a communication interface to receive a facial image of a store customer, position information for the customer indicating a position of the customer in the store, and item registration information indicating items registered by the customer using a customer terminal. A processor compares the facial image to a facial image pattern associated with potential customer states, compares the position information to a movement pattern associated with potential customer states, and compares the item registration information received via the communication interface to pre-established item registration values associated with potential customer states. Based on the comparisons, the processor identifies whether a present state of the customer is considered to be one of the potential customer states. A report is generated if the present state of the customer is considered one of the potential customer states.