Depending on the National demonstration Center of experimental Teaching, School of Civil Engineering of Chongqing University constructed virtual simulation experiment system for experimental contents with high cost, high risk and long cycle, such as air conditioning cold and heat source system and ventilation and air conditioning system of building environment and energy application engineering. Three comprehensive virtual simulation experiment systems were constructed: air conditioning cold and heat source system, air conditioning system and hot water heating system. Under the aim of training creative engineering talents with ability to solve complex engineering problems, experimental construction was concentrated on the practice teaching system and maintained the principle of “virtual reality complementation ”. The contents provide mutual evaluation system and complete experiment course including virtual simulation experiment system under multiple working conditions and accident condition. In the form of online experiment, it’s more convenient and shared. From 2020 to 2021, the virtual simulation experiment system has got high evaluation from our undergraduates and more than 300 students in 4 universities.