To reduce a supply passage in a total air system snow cooling system and to provide system individual control and compound general control by dispersion installation of a cold heat source.

In constitution of a large scale total air system snow air conditioning system, specifications for constitution of an air trunk, air supply circulation, and exhaust, adapting for application of a building, a mode at each post, and the special property of an individual room, are easily sorted, and systematization is effected at every application region, and a single snow silo to an individual system is situated. Snow storage chambers, scheduled to be dispersed, are separated from a main building and installed in a dispersion state as a snow storage silo. The dispersion system interconnects the main building and the snow storage silo only through the air trunk, and enables an air supply power system and the main board of a control apparatus to be contained in an incidental management space of the silo.