The invention provides an information synchronization method and a terminal. The method includes steps of obtaining a sign for running a terminal of a preset communication tool when the preset communication tool is under the running state; determining the terminal purpose according to the terminal sign; confirming the communication group matched with the terminal purpose in the preset communication tool; obtaining signs of contact persons in the communication group; obtaining the history communication record matched with the signs of the contact person. Therefrom, the technical scheme provided by the invention can directionally synchronize the history communication record of contact persons matched with the terminal purpose; thus the user demand is satisfied while the synchronous information data size is reduced; furthermore, the synchronous data loss caused by synchronizing too much data can be effectively solved.