Experimental test results of field construction, Cheongju University Educational Liberal Art Building, applying the insulating curing method on slab concrete showed that the quality of concrete in fresh and hardened state satisfied all target values. Temperature history of slab concrete in A and B are as e cured more than 7.8~9.2℃ higher than outside atmosphere. After completing certain curing period of time on the surface of the structure, crack ℃ occurrence was not found. It is concluded that the preventing vaporization of moisture by the insulating curing method reduces plastic and drying shrinkage as well as improves durability.