Facing up to problem that the extant freezer is not convenient to disassemble and transport, we design a demountable freezer which is based on the concept “modularization”. The volume and shape of newly-designed freezer is modulated by the addition and remove of the modules. Demountable freezer could be widely utilized in daily life, military field and emergency aid e.t.c. Its demountability is dramatically beneficial to the user’s need, not only because it can be assembled when it is needed, but because it could save more space for people when it is set aside. The convenience, its economic and social effect and its optional structure because of the current high-tech of demountable freezer is unmatched by the traditional freezer.