The invention discloses low-reversing reliability and frequency method for controlling a four-way valve, which comprises control processes under the following use conditions: during heat generation, time A is determined according to an ambient temperature and an unloading electromagnetic valve is turned off at the same time, then the cold air-resistance operation of an indoor fan and an inverter compressor are started, a pilot valve of a four-way wave is turned on to act when the inverter compressor operates for 180+A seconds, and the four-way valve realizes inversion and an outdoor fan operates at the same time; for machine stop during heat generation, the inverter compressor and the outdoor fan are turned off first, then the unloading electromagnetic valve is turned on to allow an exhaust pipe and an intake pipe to be communicated continuously for time B, and finally the pilot valve of the four-way valve is controlled to be turned off to reset and the indoor fan is turned off at thesame time, wherein the time B is between 5 and 15 seconds; and during heat regeneration, the unloading electromagnetic valve is turned off first and the pilot valve of the four-way valve is controlled to be turned on to act at the same time, then the inverter compressor is started, and the indoor fan starts cold air-resistance operation and the outdoor fan starts operation when the inverter compressor operates for 180 seconds.