An adjustable humidity chamber consisting of a humidity controller and an adjustable humidity chamber was developed to separate the attached textile layers and to test the feasibility of separating at different levels of humidity. It has the function of setting humidity freely and keeping constant humidity, air circulation; recording temperature and humidity continuously; and easily observing objects; easily taking out and putting in. The successful conservation of the Han Dynasty silk roll and research of its characters change proves that the adjustable humidity chamber is suitable of use with most textiles and gives satisfactory results.