The allergic dermal tests were carried out in 122 patients who were treated from June 1987 to August 1988. The positive rates for mycomutacapitis, myco-root-black, dust mite and artemisia pollemo were 37.5%, 34.5%, 34.2% and 21.88% respectively in inhaled antigens used for skin test. The positive rates for sesame, peanut, allium and garlic were rather high in food antigens used for skin test. The serum IgE and the total IgE tested by BA-ELISA and human basophil degranulation test (HBDT) were observed in 68 patients with allergic asthma and 52 healthy persons. It was found that the positive rate of BA-ELISA (82.35%) and HBDT (84.70%) coincided well with the dermal test. There was significant changes in serum level of the specific IgE and the total IgE before and after desensitizing therapy with the dust mite dermotaphagoides for 6 months (P less than 0.001).