Disclosed are a control software downloading method and system for a wireless terminal. The method comprises: S1, in a wireless terminal, storing control software for controlling the wireless terminal; S2, establishing, by a control device, a connection link with the wireless terminal by means of wireless communication; and S3, directly downloading, by the control device, the control software from the wireless terminal. The system comprises a wireless terminal and a control device, wherein the wireless terminal comprises a storage module for storing control software and a wireless communication module for establishing a wireless connection link with the control device, and the control device comprises the wireless communication module for establishing a connection with the wireless terminal. In the present invention, the downloading of control software can be independent of the support of the Internet, and also does not need the aid of a storage medium, which reduces costs, and further has the advantages of secure, rapid and simple downloading. The present invention can be widely applied to various control software downloading systems.