According to the reviewed study the problem of multi- objective optimization of power system based on Pareto optimization. A brief introduction of the Pareto multi- objective optimization problem is brought out firstly.Then we analysis the methods do with multi- objective optimization problem of power system based on Pareto optimization. Also,the solution of Pareto optimization such as MOEA、- MOEA、SPEA、NSGA- II、NPGA、MOPSO are displayed. Finally,the research trends and the development direction in this field is prospected.