Since its inception in 2003，the construction of ASEAN Economic Community （AEC） keeps going smoothly，while the launch of AEC Blueprint at ASEAN’s 13th annual summit，by providing detail targets and action plan for the next step of AEC，means a new level of ASEAN regional integration. This paper will mainly focus on what AEC aimed at and its development since 2003. It concludes that ASEAN may announce success of AEC in 2015，but the tough challenges it has to face means it will be a discounted success.