Embodiments of the present invention disclose a method, a device and a system for access technology configuration. The method includes: receiving a registration request of an access point, where the registration request includes a function unit list or a module class identification in the access point, the function unit list includes all function unit lists of a new module in the access point or a newly-added function unit list of the new module, and the module class identification is used to differentiate modules including different function units in the access point; identifying an access technology of the access point according to the function unit list or the module class identification, and generating access technology configuration information; and sending the access technology configuration information to the access point, so that the access point configures the access technology corresponding to the access point according to the access technology configuration information.