The purpose of this study is to analyze the influence of loess brick envelop on indoor humidity. Losse bricks are known to have excellent indoor humidity control capabilities, but the effectiveness may be reduced when used with insulation materials with high moisture permeability resistance. To analyze this, the indoor temperature and humidity of a losse brick house with moisture damage and a wooden house were measured and compared. The field measurement was conducted in July and August during high temperature and high humidity. As a results, the losse brick house showed a more stable temperature change and had a lower peak temperature, but showed less comfortable results due to high relative humidity. Moreover, it was also found that there was a higher risk of moisutre damage.