A method, an apparatus, a system locate an IPTV fault, where the method includes: performing synchronized evaluation on a monitored IPTV video stream according to a synchronization message, obtaining multiple corresponding local upstream evaluation results; receiving an evaluation result report message sent by a downstream monitoring point, where the evaluation result report message includes a downstream evaluation result, an evaluation result identifier, and synchronization packet information; finding, according to the synchronization packet information and the evaluation result identifier in the evaluation result report message sent by the downstream monitoring point, an upstream evaluation result corresponding to the downstream evaluation result; comparing the downstream evaluation result with the upstream evaluation result, and performing fault locating according to a result of the comparison. The present disclosure implements IPTV fault locating, saves costs of manpower and material resources, and improves efficiency in fault locating.