The invention discloses an installation method of a wall-hanging type air conditioner in a living chamber. The installation method of the wall-hanging type air conditioner in the living chamber comprises the following steps that stepone, a containing cavity is formed; steptwo, the wall-hanging type air conditioner is hoisted; andstep three, the wall-hanging type air conditioner is processed. The arranging structure of the wall-hanging type air conditioner in the living chamber comprises the wall-hanging type air conditioner and the containing cavity formed in a ceiling, an air inlet through groove is formed in one side of the containing cavity, and an air outlet through groove is formed in the bottom surface of the containing cavity, the wall-hanging type air conditioner is arranged in thecontaining cavity, the wall-hanging air conditioner comprises a mounting seat, a fan, a filter plate, and a heat exchangingpiece, the mounting seat is installed in the containing cavity and attachedto awall on the side surface of the ceiling, the fan is fixedly arranged on the mounting seat, the filter plate is arranged between the fan and the air inlet through groove, the heat exchangingpiece is arranged between the fan and the air outlet through groove, the filter plate, the mounting seat, and the heat exchangingpiece are combined to enclose the fan. According to the installation method and arranging structure of the wall-hanging type air conditioner in the living chamber, installation is quick, replacement, cleaning, and repairing are convenient, and at the same time, the heat exchanging effect is better.