Method and system for adjusting bandwidth

The invention discloses a method and a system for adjusting bandwidth, wherein the method comprises the following steps that: a resource strategy sever receives a bandwidth self-service activation request sent by a portal site client, and the bandwidth self-service activation request carries target bandwidth; the resource strategy sever analyzes network resources of a user according to user network information reported by a broadband access server and the target bandwidth; the resource strategy sever issues a first control strategy to the broadband access server according to the analysis result; and the broadband access server executes the first control strategy to adjust the bandwidth of the user. The invention also provides the system for adjusting the bandwidth, which comprises the resource strategy sever, the broadband access server and the portal site client. The method and the system achieve real-time adjustment of the bandwidth by the user according to needs and provide great convenience to the user.