INFORMATION PROCESSING SYSTEM AND INFORMATION PROCESSING METHOD

An information processing system that accepts a subscription from a user who presented a regular service code issued from a store where a prescription order for a contact lens by a doctor is confirmed, and sells the contact lens by regular delivery, the information processing system including a storage in which user identification information identifying a user who made the subscription, a regular service code issued to the user, contact lens information of the prescribed contact lens, a regular delivery date of the contact lens, and a purchase history of the contact lens of the user are stored in association with each other; a cancellation processing unit that, in a case where a notification is acquired from the user to cancel the purchase of the contact lens for the regular delivery date, executes a process of canceling the delivery of the regular delivery date, a delivery instruction output unit that outputs a delivery instruction to deliver the contact lens when the notification to cancel is not received from the user, a recording processing unit that updates the purchase history related to the regular delivery of the user under the condition that the contact lens is delivered to the user by regular delivery, and a price determination unit that adjust and outputs the price of the contact lens serving as a target of the regular delivery according to the purchase history related to the regular delivery of the user.