As the international standards in the field of electricity markets

IEC 62325 have defined the common standards for information modeling within the market management system (MMS) and the information exchange between the energy management system ( EMS) and MMS

laying the foundation of “unified standards

unified models

interconnecting and open” pattern for the MMS system and EMS system. The background and formation process of standards IEC 62325

and the two main market patterns

the United States electricity market and the European electricity market

are analyzed. The architecture of IEC 62325 standards are described with the latest development and application. This work is supported by State Grid Coporation (No. DZN17201300045).