The ventilation and air conditioning project of the Art and Sports Center of Qilu University of Technology has a total floor area of about 30000 square meters, and is composed of many large space stadiums, such as the auditorium, basketball hall, volleyball hall, badminton hall, etc. In order to solve the problems of difficult air supply and uneven air volume in large space, and to meet the strict requirements for wind speed in badminton, table tennis and other competitive venues, the system uses air-cooled heat pump unit+combined air conditioning unit+fan coil unit to achieve cooling and heating in summer, and steam heat exchange unit+combined air conditioning unit+fan coil unit to achieve heating in winter. The overall system has high utilization rate, strong user experience and comfort, and obvious energy-saving and environmental protection benefits. The project was completed in December 2017 and officially put into use, and won the "Taishan Cup" award for construction quality in Shandong Province in 2017.