The rotating wheels of rotary total heat exchanger constantly rotate at the speed of 10 rotations per minute and act as heat ＆cold storage cores. Fresh air passes through one semicircle of rotary heat exchanger; at the same time, air exhaust inversely passes through another semicircle of the rotating wheels. By this way fresh air and air exhaust alternately inversely pass through the rotating wheels; at the same time air exhaust releases heat into the heat ＆cold storage cores.
　　 In the total heat rotating wheels, the transference of humidity is also guaranteed. Moisture abstracted from air current enters moisture absorption coating of heat storage cores and releases moisture out when the rotating wheels rotate to another air current.
　　 Total heat exchanger uses that exhaust air and fresh air exchange sensible heat and latent heat to recover energy and further conserve energy and keep good ventilation. Fresh air can be pre-cooled and removed humidity in summer and be pre-heated and humidified in winter so as to reduce cooling load and power consumption in the process of air conditioning running. Special micro-porous molecular sieves ensure that there is no cross contamination in the process of moisture exchange.