The embodiment of the invention discloses a data management method, device and system. The method comprises the steps that the system is initialized, initialized data catalogs include, at least, a production data catalog and an even data storage catalog; when service transaction operation is monitored, the operation is executed by the system through an entrusted transaction model. By adopting the operation, the phenomenon that production data is directly modified according to services and accordingly the risk is possibly caused is avoided, and safe safety is improved.