This paper analyzes the condition of undergraduates' daily stress,as well as the level of depression and anxiety.The authors are exploring the relations among daily stress,depression,and anxiety,and caring for whether undergraduates' depression can be predicted through daily stress,and which standards can help us.Hereby it aims at arousing more concerns for students' daily stress,depression,and anxiety,and then taking proper measures to help students dispel their worryied and depressed emotions.