The invention discloses a broadband service guarantee support system. The broadband service guarantee and support system at least comprises a test ready module, a test work order module, a test execution module, a fault diagnosis module, an operation processing module and a query statistic module, wherein the test ready module comprises a test requirement management module, a test index management module, a test instruction management module, a test resource management module, a test route management module, a test scheme management module, a test configuration module and a test task module; the test work order module comprises a work order receiving module, a work order analyzing module, a work order execution module, a work order receipting module and a work order completion module; andthe test execution module comprises an automatic test module, a manual test module, a test report module and a test early-warning module. According to the broadband service guarantee and support system disclosed by the invention, an overall system function submodule is designed, the overall guarantee support of broadband services is realized, relative problems of broadband can be accurately solved, and the broadband services can be effectively supported.