The invention discloses a double-compressor air energy heat pump heat supply and heating system which comprises a unit part, a heat supply part, a heating part and an intelligent control part. The unit part comprises an air energy heat pump heating part, an electric heating part, a water pipeline part and a control circuit part. The control circuit part is used for controlling the air energy heat pump heating part to adopt different compressor assemblies according to detected water input temperature and environmental temperature. When the fact that water output temperature reaches a set temperature after compressors are started is detected, the electric heating part is controlled not to carry out output. When the fact that the water output temperature cannot reach the set temperature is detected, the electric heating part is controlled to output needed electric heating power according to a detected water input and output temperature difference and flow detected by the water pipeline part. When the air energy heat pump heating part and the electric heating part both carry out full-power output and the water output temperature does not reach the set temperature, the water pipeline part is controlled to adjust water flow through a water flow adjusting valve to enable the water output temperature to be constant according to the detected temperature.