Heat and cold sources of a temperature and humidity independent control air conditioning system comprise a compressor (1), a first condenser (2) and a second condenser (3) which are connected successively, a first expansion valve (4) and a second expansion valve (5) which are respectively connected to the second condenser (3), a first evaporator (6) and a second evaporator (7)which are respectively connected to the compressor (1). The first evaporator (6) is connected to the first expansion valve (4) to form a first cycle branch while the second evaporator (7) is connected to the second expansion valve (5) to form a second cycle branch. The first cycle branch and the second cycle branch are connected in parallel between the second condenser (3)and the compressor (1). The heat and cold sources of the temperature and humidity independent control air conditioning system have a relatively high refrigeration efficiency so as to significantly reduce energy consumption and protect environment.