The invention discloses a data synchronization exception processing method. The method comprises the following steps of: monitoring a synchronization state of data synchronization between a slave server and a master server; judging whether data synchronization of the slave server has an error or not according to the synchronization state; if the data synchronization of the slave server has the error, extracting error information of the synchronization error; and sending the error information to a client. The invention furthermore provides a data synchronization exception processing device andthe server. According to the method and device and the server, data synchronization exceptions can be processed in time, so that the system safety is improved and the normal operation of system businesses is ensured at the same time.