The invention provides a method for deleting bound information in a DRA (Diameter routing agent). The method comprises that when a strategy control session established by a first strategy server and a second strategy server for user equipment is terminated, the first strategy server determines whether a domain where the second strategy server is located exist any DRA (Diameter routing agent), and if any DRA exists, the first strategy server sends a message to the domain where the second strategy server is located to make a request of deleting DRA bindings in the user equipment. The invention further provides a strategy server. A system for deleting bound information in a DRA (Diameter routing agent) is further provided. According to the method, the system and the strategy server, when the strategy control session is terminated, whether a DRA exists or not is firstly determined, and only when a DRA exists, a message then is transmitted to delete the DRA bindings, and thus unnecessary signaling sending is prevented.