The invention relates to a data service simulation method and a data service simulation system. The data service simulation method comprises the following steps: judging whether one data service is to be started, if so, total information is captured; the captured information is stored and analyzed in sequence, and a service characteristic database is introduced; service characteristics are compared to judge whether the captured information still exists or not; if so, the captured information is discarded, otherwise, the captured information is saved in the database; an executable script templet is generated according to existent characteristic service; one or a plurality of service simulation programs are generated according to the script templet starting condition; the service simulationprograms are executed between a service simulation center and a service providing node, and information is exchanged between a simulation user and the service providing node, therefore, a data service and a core network are more compatible, the workload of related testing is effectively reduced, and the data service product quality can be improved.