Abstract: The false data injection attack is one of the most important problems in the study of power system security.It is of great importance for the security and stabilization control of the power systems under the tendency of smart grids.This paper makes a full-scale introduction to the research on false data injection attacks in power systems.Firstly,the process of EMS including state estimation and bad data detection and false data injection attacks is presented.Secondly,an introduction is made to show the work on false data injection attacks.Finally,existing problems and open issues are discussed.