The history of electricity industry in China can be generalized as cycles of electricity shortage and surplus. Itís widely believed that lack of accurate information about future electricity demand is the main cause to this problematic phenomenon. However, there are still few people who believe long time of power station construction so that the investors ignore the stations under construction is the main effect, rather than the information about electricity demand. In this paper, an experiment is carried out to test whether these hypotheses are right or not. Factorial designs with 2 treatments, information about stations under construction and information of future electricity demand, are used to test which of these two factors is the main effect. Statistical analysis indicates that awareness of how many stations are under construction will greatly improve the performance of subjects, while information about the future electricity demand, although assumed accurate, has no significant effect on the performance of the subjects.