Abstract: Operation simulation and capacity planning software tools in power systems play an important role in power system planning, operation and evaluation. In recent years, with the large-scale integration of renewable energy, the research results of models and methods for operation simulation and capacity planning are emerging one after another, and the corresponding software tools have also ushered in significant progress and updates. This paper summarizes a variety of mainstream software tools for operation simulation and capacity planning at home and abroad, and focuses on analyzing the characteristics of various software tools including general structure, temporal resolution, power flow models, unit commitment constraints, solving algorithms, etc.In addition, combined with the current research status and the development trend of the power system, related thoughts of the future operation simulation and capacity planning tools in the power system are proposed.