The information disclosure system of the electricity market in America is investigated from the national and regional levels. On the national level

the general situation of electricity

the electricity production and consumption

the electricity market operation and environmental information disclosed by United States Energy Information Administration are introduced in details. The institutional consideration of the disclosure in the national level is analyzed. On the regional level

PJM electricity market is taken as an example. The information disclosure of energy market and ancillary service market in PJM is introduced in details and analyzed

which includes system operation information

market price

market supply and demand situation

bid data and market structure information. Considering China's national conditions

the policy suggestions of information disclosure system are then proposed. The information disclosure on the national level which takes the guide of resources to flow across regions as the core and that one on the provincial level which proves the credibility of the market operator and improves the provincial market efficiency should be established.