The present invention discloses a realization method of business affair VPMN service based on the intelligent network, which comprises the following processing steps that firstly, according to the calling record in history of the group users, a group dynamic users list is generated; secondly, at least one favorable price class is set, and each dynamic user in the list of the first step assign a favorable price class according to the setting rule; thirdly, when the group users call, the user in the users list is in the dynamic to the other party, the charging of the group users is operated according to the price project of the corresponding favorable price class in the second step, and the calling record is preserved into the calling record in history. By adopting the method of the presentinvention, the business affair VPMN service can be achieved without adding network element equipment and hardware, thus protecting the original investment of the operator. Moreover, due to only increasing the logic of the intelligent network service, the software upgrading is needed only, and the generalization is easy.