To provide a settlement processing system for achieving settlement using a portable terminal at ease without requiring clerk's excess education burden or a plurality of manual books.

In the settlement of payment of a store commodity 1, a portable terminal 3 loaded with a non-contact card 3a of a purchaser 2 is held over a reading terminal 4a of a POS terminal 4, settlement procedure information recorded as a contracted settlement procedure which is settled by the portable terminal 3 and portable terminal model information recorded as model information including a manufacturing maker and a model of the portable terminal 3 are read from the non-contact card 3a, and a screen for selecting a required settlement procedure from all settleable settlement procedures is edited and displayed on a customer display 4b for the purchaser 2 and an operator display 4c for a clerk 5. If a trouble occurs in settlement, a trouble solving operation guidance screen optimum to the model of the portable terminal 3 based on the portable terminal model information is edited and displayed on the customer display 4b and the operator display 4c.

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