<；P>；PROBLEM TO BE SOLVED: To provide a temperature and humidity control device capable of controlling temperature and humidity in a horticultural house etc. while reducing fuel cost. <；P>；SOLUTION: The temperature and humidity control device 1 performing heating in the nighttime and humidification in the daytime includes: an adsorbent 9 capable of adsorbing/desorbing moisture； an air flowing means 5 making air flow along a route 3 coming into contact with the adsorbent 9； a heating means 7 heating in the daytime air on the upstream side from the adsorbent 9 in the route 3； and a high-humidity air supply means supplying in the nighttime air with higher relative humidity than that of the air heated by the heating means 7 to the upstream side in the route 3. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
