The invention discloses an air conditioner system and a control method of the air conditioner system. The air conditioner system comprises a compressor, a four-way valve, an outdoor side heat exchanger, an indoor heat exchanger, a first electronic expansion valve, a second electronic expansion valve, an indoor radiant plate and a control part; the control part comprises a first pipeline opening, a second pipeline opening, a third pipeline opening and a fourth pipeline opening; the first pipeline opening of the control part can be switched to be communicated with the second pipeline opening or the fourth pipeline opening; the third pipeline opening of the control part can be switched to be communicated with the fourth pipeline opening or the second pipeline opening; the second pipeline opening of the control part is communicated with the first end of the indoor heat exchanger; the third pipeline opening of the control part is communicated with the second end of the outdoor side heat exchanger through a pipeline; and the fourth pipeline opening of the control part is communicated with the second end of the indoor heat exchanger through a pipeline. By means of the air conditioner system and the control method of the air conditioner system, the problems that an air conditioner system in the prior art is poor in heat exchange effect and low in comfort degree are effectively solved.