The purpose of technology education is to cultivate the technological literacy of the students in daily life. By the processes of education, students study the knowledge needed in their lives, understand the development of technology and its influence to human beings and make use of the materials and tools of technology. As a result, they can improve their basic abilities of value judging, problem solving and creative thinking in technological society. This study plans to treat the theories and practicality relative to the choice of appropriate technology when teaching in the classrooms by the investigation and analyses of literacy. And it is expected to obtain some practicable and feasible models as conclusions and will provide useful suggestions for the teaching staff to actualize in their classrooms. It will also provide some workable directions for other investigators to follow as they devote themselves to relative studies in the future.