Abstract: This study was to investigate the degree of sexual behavior of college students. A survey was distributed from September to October in 2015. Total 236 college students. The collected data were statistically processed using SPSS WIN 22.0 and the descriptive analysis, t-test, ANOVA and Pearson’s correlation coefficient analyses were performed The mean of sexual behavior was 0.17.53±7.61 (score of range 0~36), 1.46±0.63 (scale of range 0~3). The risk environment should be minimized on an individual basis so that college students have the right sexual behavior. The mean of perception of marriage was 79.96±10.80 point (score of range 23~115). The level of sexual knowledge was 23.75±7.06 point (score of range 0~40). Subjects with experience of sexual contact (t = 2.617, p = 0.009) and higher number of partners (F = 2.197, p = 0.005) showed higher perception of marriage with statistical significance. Subjects with later sexual contact (F = 4.215, p = 0.017) showed higher sexual knowledge with statistical significance. Subjects with experience of date (t = 5.460, p<0.001), experience of sexual contact (t = 11.395, p<0.001), earlier sexual contact (t = 3.426, p = 0.001), experience of sexual transmitted diseases (t = 5.459, p<0.001) and higher number of partners (F = 21.588, p<0.001) showed higher sexual behavior. There was no correlation between sexual knowledge and perception of marriage (r = 0.131, p = 0.044). There was correlation between sexual knowledge and sexual behavior (r = 0.069, p = 0.288) and correlation between sexual behavior and perception of marriage (r = 0.191, p = 0.003). A careful assessment of the sex-related characteristics of the subject and the degree of sexual behavior is needed. Sex education is needed so that college students have the right sexual behavior. Sex education for college students should not only meet individual needs but also include appropriate communication strategies with the dating partner.