From the perspective of environmental sociology, a questionnaire survey was conducted on the environmental awareness and behaviors of undergraduates from nearly all fields of majors in Sichuan Agricultural University. According to the investigation results, there are los of problems, for example, the college students generally do not have adequate knowledge about environment and are unclear about the existing national ecological law system; their attitude towards environment is often influenced by their majors; their evaluation of environment is far from the reality; their environmental behaviors are weakly restrained and conserved. According to these problems, related suggestions were proposed.