To provide a system and a method for buying and selling a software part and a storage medium for storing a program for buying and selling the software part capable of assessing without depending on a form and operation of the software.

When a new applicant or a revised applicant applies for an assessment of the software part applied by a personal computer terminal 1, a server 10 receives the application for the assessment. An assessor evaluates and assesses a document of the applied software part or the like on the basis of a minimum standard for screening stored in the server 10. When an amount of the assessment is determined after the screening, the software part to be purchased is stored in a database part 27 of the server 10, and notification to the new applicant or the revised applicant is made. A person who wants to buy can transmit a procedure for purchasing a desired software part from a personal comuperture terminal n side to the server 10.