The present invention discloses a method for synchronizing the configuration data between an EMS and a NE, which includes: dividing the configuration data in the NE into several layers so that different configuration data layers include different minimum unit configuration data sets; setting a minimum unit identifier word for each configuration data layer to identify the configuration data changes of the configuration data layer; when the configuration data of the NE is changed, changing the corresponding identifier word and sending a configuration changed event notification to EMSs; after receiving the configuration changed event notification, the EMS synchronizes the configuration data according to the event notification. With the present invention, it is possible to make the EMS effectively monitor and synchronize configuration data with the NE in a real-time manner, so that network management efficiency can be improved.