The new world-wide trend in science education is toward accomplishing "scientific literacy" which pursuits "science education for all", instead of "science education for elites". Scientific literacy is the capacity to use scientific knowledge, to identify questions and to draw evidence-based conclusions in order to understand and help make decisions about the natural world and the changes made to it through human activity. The reasons why scientific literacy is needed in science education are as followings: it helps make a scientifically proper decision as a future voter, it helps acquire economic benefits and further national security by understanding recent technology, it helps make our behavior more reasonable by learning thinking-skills of predictable result, and it helps have more moral attitudes by becoming familiar with scientific methods. Above-mentioned reasons should be more elaborated to avoid contradictions. Scientific literacy in science education and literacy education are closely related. The common factor between scientific literacy and literacy education is not only 'interpretation' but also 'utility'. The person of literate is one who knows as well as utilize. Both interpretation and utility possess "functional" literacy and emphasize thinking process. So far science educators have been just interested in knowledge and process skills in science and neglected the importance of literate ability of science texts. Scientific literacy and literacy should be incorporated into the same educational scheme and therefore understood in conjunction with each other in the future.