The invention discloses a system and method for capturing the multi-screen terminal network quality of a cable television network in real time. A client side sends a capturing request to a platform terminal, and the platform terminal matches and verifies user information, sends a capturing and collecting order and returns the verification confirmation information. After the client side obtains the verification confirmation information, a local computer is started for capturing and measuring the speed and sends detection data to the platform terminal. After the platform terminal receives the detection data sent by the client side, the detection data together with legal fault user information and CMTS/CM network index information are stored into a synchronous storage module and sent to an operation and maintenance system. The system and method are applied to the operation and maintenance of the multi-screen terminal network of a cable television, user speed measuring data and user information can be rapidly and accurately bound, the fault point can be fast located, an operation and maintenance call center is informed timely, the capturing operation is convenient and fast, and the operation, maintenance and service efficiency is improved while the operation and maintenance cost is greatly reduced.