The present invention relates to a design support system for financial products of a divisional payment type (FPD). A plurality of computing modules according to the present invention are systematically disposed within a communication pipeline of an FPD sales staff's communication terminal which is connected to an online network so that the FPD sales staff can provide FPD design particulars corresponding to desires of customers whom the FPD sales staff is handling without any particular difficulties in real time using the modules. Accordingly, it is possible to guide the FPD sales staff and an FPD management company, and furthermore, each customer can easily avoid problems related to reduction in business efficiency or sales efficiency of the FPD, and the inability to rapidly invest in and possess desired FPD, and the like.