Facebook is the biggest social networking website at present. The main purpose of this study was to investigate the Tainan City junior high school students' Facebook usage. Therefore students from Tainan City were served as the study sample. Questionnaires and the interview were used as the research methods. After analyzing, the following results were obtained:1. Over 90 percent of junior high school students use Facebook with high frequency.2. Junior high school students' Facebook friends are mainly from who they know in the real world.3. Over 60 percent of parents own Facebook accounts and junior high school students would add them as friends on Facebook.4. Over 60 percent of junior high school students would add school teachers to their Facebook friend lists. Based on the survey and findings, some suggestions for junior high school teachers, parents, school counselors and future studies were proposed.