This study discusses the importance and practical strategies of Heating, Ventilation, and Air Conditioning (HVAC) course teaching reform in colleges and universities under the background of the Internet. With the rapid development of information technology, the Internet has brought unprecedented changes to the field of education. This paper first analyzes the problems existing in the traditional HVAC course teaching, such as being out of the industry demand, weak teachers, insufficient practical teaching, single teaching methods, and so on. Then, combined with the advantages of Internet technology, it puts forward a targeted teaching reform plan, taking effective reform measures to achieve the expected teaching results, aimed at improving the teaching quality of HVAC courses and training more high-quality talents to meet the needs of the times.