With the technology development and commonly use of pad and smart phone, the characteristic of portable and flexibility make the prevalence grow every year. Not likely the heavy books,you just have to download books or magazines to your own computer or portable tools which you can take it everywhere easily. However, there are some researches find that the background color and the font size of the e-book would influence users’ reading speed. In this research, after the e-‐ book and user surveys, we use six colors background and four different font sizes for researching the analysis. The result shows that the page of yellow background and 14 font size can make readers read in the fastest speed.

Keywords :ebook, background color, font size, reading speed