An information synchronization method based on a personal information management system, comprising: a user data server at a network side storing status information of a first user and copying the status information of the first user to a name card of the first user stored by a second user in a personal information management server; and the PIM server synchronizing the status information of the first user in the name card of the first user to a communication terminal of the second user; wherein the method further comprises: the first user setting a synchronization range of his/her own status information, which includes: - setting a range of the status information which is allowed to be copied to the PIM server; and/or - setting a range of second user(s) which is allowed to be copied into the PIM server; after the second user changes the status information of the first user in the name card of the first user in the communication terminal of the second user, synchronizing the changed status information of the first user or the name card containing the status information of the first user to the PIM server; the method characterized in that it further comprises: the PIM server synchronizing the changed status information of the first user to the user data server according to the received changed status information of the first user or the name card of the first user. a user data server at a network side storing status information of a first user and copying the status information of the first user to a name card of the first user stored by a second user in a personal information management server; and the PIM server synchronizing the status information of the first user in the name card of the first user to a communication terminal of the second user; wherein the method further comprises: the first user setting a synchronization range of his/her own status information, which includes: - setting a range of the status information which is allowed to be copied to the PIM server; and/or - setting a range of second user(s) which is allowed to be copied into the PIM server; after the second user changes the status information of the first user in the name card of the first user in the communication terminal of the second user, synchronizing the changed status information of the first user or the name card containing the status information of the first user to the PIM server; the method characterized in that it further comprises: the PIM server synchronizing the changed status information of the first user to the user data server according to the received changed status information of the first user or the name card of the first user. the first user setting a synchronization range of his/her own status information, which includes: - setting a range of the status information which is allowed to be copied to the PIM server; and/or - setting a range of second user(s) which is allowed to be copied into the PIM server; - setting a range of the status information which is allowed to be copied to the PIM server; and/or - setting a range of second user(s) which is allowed to be copied into the PIM server; after the second user changes the status information of the first user in the name card of the first user in the communication terminal of the second user, synchronizing the changed status information of the first user or the name card containing the status information of the first user to the PIM server; the method characterized in that it further comprises: the PIM server synchronizing the changed status information of the first user to the user data server according to the received changed status information of the first user or the name card of the first user. the PIM server synchronizing the changed status information of the first user to the user data server according to the received changed status information of the first user or the name card of the first user.