Disclosed is a agricultural and marine product dryer capable of two-way loading of dried products and separate circulation of hot air and dry hot air. The present invention is to increase the heating efficiency and to arrange the heating device outside the drying room to facilitate the loading and withdrawal of various drying, intelligently inserting the heating tube into the drying chamber, and drying hot air separately from the hot air circulation in the heating tube through the circulation fan Is further circulated in the drying chamber. In the present invention, the hot air supply device (50) cooling device (40) is disposed outside the drying chamber (60), but the heat exchange circuit (40) is configured to circulate inside the drying chamber in a closed circuit type, and the refrigerant evaporation tank (53) is a cooling device. Similarly, it is characterized by a configuration that is placed outside the drying chamber and blocked from the dry matter. This structure minimizes the loss of thermal energy for heating and the loss of refrigerant energy for cooling. In addition, due to the internal arrangement of the heat exchanger circuit, the refrigerant evaporation tank is disposed at the lower part of the drying chamber so as to be sufficiently separated from the surface of the drying chamber in consideration of excessive heat discharge from the side and the top of the drying chamber, and the circulation direction of the air inside the drying chamber is normally Differently from the circulation direction, the suction and cooling down to discharge the condensed water immediately to the ground, and then discharged to a separate circulation fan up to supply a unique configuration to the interior of the drying chamber is disclosed. According to the present invention, the drying racks 64-a and b which are introduced into the drying chamber are disposed in an arrangement gap of the heat exchange circuit so as to be inserted / drawn orthogonally to the heat exchange ci
