Because the prompt progress of ICT (Information & Communication Technology), we have radically increased our capabilities of information-processing. That does contribute the endeavors to improve the quality of decision-making. However, in the practices, we still have may difficulties on making good decisions. This paper try to answer why? This paper describes the characteristics of E-age from three dimensions: technologies, managements, values. And explore the two dilemmas of decisions-making: information overloading. Postmodernity. Furthermore, we provide some discussions on the applications and feasibilities of computer simulation of decisions-making.