Ca2+-activated chloride channels (CaCC, CLCA) are a new family of chloride channels discovered recently, which are related to Ca2+-sensitive chloride ions transport, and there were several members identified currently in different biologic bodies. New studies have shown that its member gob-5 in murine (its human counterpart is CaCC1) plays a pivotal role in airway goblet cell metaplasia, mucus overproduction, MUC5AC gene expression as well as airway hyperresponsiveness (AHR) in asthma, and is a key molecule in the induction of murine asthma and an asthma-related gene. Inhibition of their function and/or their signaling pathway may therefore provide a new therapeutic strategy for asthma.