To realize the saving of energy as environmental measures; to suppress an influence on a heat-island phenomenon through the generation of heat of condensation associated with dehumidification, and a reduction in the disposal of sensible heat, while enhancing the functions of dehumidification/heat-shielding and humidity conditioning in summer; and to enhance an air-conditioning effect.

A moisture-absorbing/desorbing material is used as a structural material/heat-insulating layer and an interior finish material, which constitute the house. A comfortable habitable space is realized by utilizing radiation cooling/solar heat etc. for water content control/humidity regulation/energy transfer in such a manner as to induce humidity absorption/cooled-air absorption and evaporation/humidity adsorption by complementary cooperation between the different moisture-absorbing/desorbing materials, and an secular function formed based on the heat of radiation brought by a synthetic-resin heat-insulating material.