The invention discloses an air conditioner system and an air conditioner provided with the same. The air conditioner system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a reversing assembly, a first throttling element, a second throttling element, a gas-liquid separator and a liquid storage device. The compressor comprises a first air cylinder, a second air cylinder, an exhaust opening and an air return opening. The exhaust volume ratio of the second air cylinder to the first air cylinder is smaller than or equal to 0.1. The reversing assembly comprises a first valve opening, a second valve opening, a third valve opening and a fourth valve opening. When the air conditioner system conducts cooling, the first valve opening is communicated with the second valve opening, and the third valve opening is communicated with the fourth valve opening. When the air conditioner system conducts heating, the first valve opening is communicated with the third valve opening, the second valve opening is communicated with the fourth valve opening, and a gas outlet of the gas-liquid separator is communicated with the second air cylinder. According to the air conditioner system, the exhaust volume ratio of the second air cylinder to the first air cylinder is made to be smaller than or equal to 0.1, so that the performance of the air conditioner system can be effectively improved, and the air conditioner can reach the optimal state of energy efficiency easily.