Under the background of rapid development in science and technology, the abundant network learning resources are sharing with each other high-quality resources, which narrows the educational gap between different regions and different schools, and plays a positive role in expanding the education scale and improving education quality . A questionnaire survey was conducted on the learning approaches, learning plan and execution, and influence of network resources among college students majoring in heating ventilation and air conditioning (HVAC). Based on the survey results, the necessity and advantages of network resources in the current epidemic situation are analyzed. However, there are some problems such as a high rate repetition in network resources, lack of face-to-face interaction and feedback between teachers and students. This paper puts forward the optimization measures of network learning, and provides references for the wide network teaching in universities.