University students' information literacy is not only related to their academic achievement, but also affects their lifelong learning ability and future sustainable development. The authors chose undergraduate students at G University as a sample, using questionnaires and statistical analysis to study the current situation of students' information literacy based on information literacy construct, lifelong learning construct, and sustainable development construct. According to the study, information consciousness and information morality performed better, information safety and information skills performed at a medium level, while information knowledge was the weakest one among the five factors. Gender, household registration, grade level, and major have various effects on the abovementioned five different factors. Based on the research, the authors give some suggestions for improving students' information literacy at G University in three aspects: The construction of G University's information environment, the introduction of digital learning resources, and differentiated training.