Abstract： Objective To investigate the health concept and weight loss behavior of undergraduates and to provide basis for its improvement.Methods About 355 overweight and obese undergraduates completed a self-designed questionnaire.Results Most students surveyed had correct understanding of obese and a positive attitude to weight loss but had not enough scientific weight loss knowledge and skills.Conclusions Knowledge and skill of weight loss should be adopted to strengthen the undergraduates＇ physical and mental health.