The invention discloses an SAP park document realization method and a system based on service configuration. The method includes following steps: according to a business requirement, a park document interface is drawn via an SAP standard drawing tool table control; according to interface content, related data required by the interface content is inputted, and parameters of the park document are generated according to the inputted related data; according to the parameters of the park document, an SAP standard interface function PRELIMINARY_POSTING_FB01 is called to realize parameter input of the park document; the document is generated and saved to a database; and the above content is supplied to a portal website for calling in the manner of calling parameters. The beneficial effects of the method and the system are that the problem that the current SAP document making is not friendly, and finance staff is difficult to get started is solved, the taking of the park document for an external system is solved, and parameter exchange of the park document and the external system is realized.