The invention relates to a method and a system for protecting individual privacy in a mobile phone. The method comprises the following steps that: after a mobile phone is started up, a client back end starts and operates; events are monitored; related operation are executed according to the types of events; and after the processing of the event is finished, the client back end operates; and events are monitored continuously. The types of the monitored events comprise a mobile phone change event, a short message command event, a file data processing event, an application program processing event, a profile setting event, a program deletion event and a mobile phone / mobile phone card formatting event. The system comprises a client module and a server, wherein the client module comprises an event monitoring module, an event processing module, a communication module and a mobile phone data update and back-up and recovery module; and the server comprises a communication module, a personal information management module and a back-up / recovery module. The method and the system of the invention can realize the maximum safety protection of mobile phone privacy.