The invention relates to an air channel module and an air channel structure with the air channel module and an air conditioner. The air channel module comprises an air channel main body and a connecting assembly, wherein the air channel main body comprises an air field area in which an airflow air channel is formed, and the airflow air channel is provided with two opposite air outlets; the connecting assembly is arranged on the air channel main body; and a plurality of air channel modules can be connected with each other by virtue of respective connecting assemblies so as to form the air channel structure with a plurality of air field areas. According to the air channel module, different number of air channel modules can form different air channel structures so as to install different number of fan blades, so that the air channel module can be applied to series of products with different heat transfer periods, and the different air channel structures do not need to be independently designed and manufactured according to the products with the different heat transfer periods, so that the design and production cost is effectively reduced, and the production cycle is shortened.