Market power evaluation in the electricity market is important to ensure fair competition and high market efficiency.In view of the sources and evaluation methods of market power, the source of market power to structural market power（SMP）and physical restrictive market power（PRMP）is attributed. Based on attribution, the advantages and disadvantages of the domestic and international market power evaluation indexes and their application are summarized, reference for reasonable selection of evaluation indicators in practical applications is provided. The assessment methods are divided into three categories：market share - based assessment methods, load and congestion-based assessment methods and participant system-based assessment methods. On this basis, the development trends of market power evaluation research is analyzed to provide support for the establishment and improvement of market power evaluation research.