"Affordance" is an ecological psychology which can explain the interaction between the natural environment and its physical property of material with a combination of biology. This concept is first applied on interface design by Norman. Gaver also uses this theory to provides a evaluate framework for separating affordances from the perceptual information available about them. To those traditional book readers, the interface design of e-book is one of the reasons they refuse to use it. The user experiences of traditional reading are also have a serious effect on the e-book design. Designers of e-book cannot determine they should provide more traditional way to read or they can just make a whole new user experience on electronic reading. The goal of this study is to use ¡§Affordances¡¨ to discuss the difference between electronic and traditional reading, by using common tasks of traditional and electronic reading to observe user¡¦s action and performance. The main results are the following: the performance of e-book which this study used is lower than traditional book, because 1) Information on the interface is not clear that users may confuse, or make a wrong action. 2) Some functions didn¡¦t provide any instructions or information that can help users to know how to action. 3) The hardware of e-book is too slow that cannot reflect user¡¦s action. The main discussions of e-book as affordance approach are the following. 1) When there are multiple affordances available to choose, users will pick the most efficient one they perceived. 2) If users experienced some difficulty during action, they may choose another affordance to complete task. 3) If the perceived information of icon has multiple meanings to the users, it will cause a false or hidden affordance.