This paper introduces the design and implementation of power market simulation and training system（PMSTS）. Based on Net framework structure and uniform database， the system is composed of teacher platform（C/S structure） and students platform（B/S structure） with modularized structure and visual interface. The system can simulate different networks with different market rules， so as to achieve the goal of training power market participants and making suggestions for the mechanism of power market. As a power market simulation training platform， it can test the rationality and validity of market programs， at the same time， it can also acquaint students and professionals majoring in electrical engineering with the market trading mechanisms and market rules. An IEEE 30 bus system is used to verify its validity and practicability.