Although sawdust cultivation of shiitake (Lentinula edodes) is becoming more common, it is insufficiently competitivein spring and autumn, the best time to breed shiitake. Thus, it is urgently needed to develop a technique for all year roundcultivation of shiitake using mushroom growing beds. In the present study, the temperature changes according to the location ofshiitake cultivation facilities were investigated. We confirmed that a refrigerator, an air conditioner, triple membranes, shiitakecultivation beds, fog nozzles which were installed in the shiitake cultivation facilities play an important role in keeping the lowtemperature. Bag cultivation of shiitake was tested in temperature variation from 14oC to 29oC with a 3oC interval to know itscultivating temperature range in hot summer season. In summary, the sawdust cultivation of shiitake is possible when thetemperature difference between top and bottom is maintained below 1oC. And the temperature of the shiitake cultivationfacilities should be maintained below 23oC in the induction period for fruitbody formation.