A method for configuring device parameters in a Digital Subscriber Line access network is disclosed. According to the method, a managing device sends a parameter modifying command to a managed device; the managed device makes a response to the parameter modifying command and modifies parameters; the managed device obtains an applying opportunity of unapplied parameters; the managed device applies the unapplied parameters according to the applying opportunity. A Digital Subscriber Line access system and a network device are also disclosed.