PURPOSE: A dryer and a drying method thereof are provided to supply a heater for hot air to a drying unit according to the temperature of the drying unit and to dehumidify moisture in air formed during a drying process. CONSTITUTION: A dryer comprises a dryer part(200) in which dried goods are dried and an air conditioning part(300) which supplies hot air to the dryer part by being combined with the dryer part. The dryer part comprises support rails(230), trays(240), an air outlet(220), an exhaust fan(221), and an opening and closing member(222). The air conditioning part comprises fixing angles(311,312), a compressor(370), a condenser(350), an evaporator(330), a reservoir, a blower(360), a heater(380), an inhalation hole(320), a suction fan(321), and an opening and closing member(322). The heater is operated when the temperature of the drying room is less than 27 deg. Celsius and a refrigeration cycle is operated when the temperature of the drying room is 27 deg. Celsius or higher.본 발명은 건조장치 및 그 건조방법에 관한 것으로서, 피건조물이 건조되는 건조부와, 상기 건조부와 착탈가능하게 결합되어 히터 또는 냉동사이클에 의해 열풍을 건조부로 제공하는 공조부를 포함하는 건조장치 및 이를 이용한 건조방법을 특징으로 한다.
