The design and description approach for aspect-oriented software architecture (AOSA) has made great progress in the past several years. However, there are few efficient techniques or approaches for evaluating adaptability of AOSA. According to the characteristics and running environments of software system nowadays, this paper proposes quantitative measurement technique for evaluating adaptability of AOSA based on class point (CP) and the feature of AC2-ADL. This technique can provide support of measurement for aspectual component and aspectual connector in AC2-ADL. In the future, we will accomplish an approach for evaluating adaptability of AOSA based on this measurement technique.