The invention discloses a cabinet air conditioner with interchangeable air inlet and outlet. The air conditioner comprises a cabinet internal circulating side which is arranged towards the inside of the cabinet, and a cabinet external circulating side which is arranged towards the outside of the cabinet, wherein the cabinet internal circulating side is provided with an auxiliary fan device, and the wind direction of the auxiliary fan device can be reversely changed. According to the air conditioner, interchange between the air inlet and the air outlet can be realized so as to ensure the flexibility of air outlet mode of the cabinet air conditioner, so that the air conditioner is applicable for various cabinets of different structures and used in different situations.