The invention discloses a cabinet air conditioner, an air conditioner and an exhaust control method of the cabinet air conditioner. The cabinet air conditioner comprises a shell and an exhaust device, wherein an air way is formed in the shell; the exhaust device is fixed on the shell, and includes three exhaust structures; the three exhaust structures are all communicated with the air way; air holes are formed between exhaust ports of two adjacent exhaust structures; the exhaust structures include exhaust frames communicated with the air way, rotating mechanisms connected with the exhaust frame for driving rotation of the exhaust frame corresponding to the shell, and rotary matching pieces for forming an annular rotating groove; and a rotating part is arranged at the lower end of the exhaust frame, and is positioned in the annular rotating groove to rotate in the annular rotating groove. The cabinet air conditioner can effectively adjust the exhaust quantity, the exhaust angle and the exhaust mode, so that the temperature of indoor air effectively and quickly reaches a set temperature.