Abstract: The present disclosure relates to a server and a method for providing a product recommendation service by using purchased item information. The server for providing a product recommendation service by using purchased item information according to the present disclosure comprises: an input unit for collecting purchase information for each user; a memory in which a program for generating recommended product information for a target customer by using the purchase information for each user is stored; and a processor for executing the program, wherein the processor inquires about other customers with a purchase propensity similar to that of the target customer, and generates recommended product information to be recommended to the target customer in consideration of purchased items of other customers.