Disclosed are a system and method for providing a product order service in an electronic transaction. With the system and method, it is possible to conveniently order an online/offline product through an electronic transaction and also make and distribute a simple app for a small retail shop such as a fried chicken shop, by transmitting purchaser information required for an order to the partner company server in addition to payment-related information about purchase of the specific product or cooperating with a partner-company-related application service.