This　paper　analyzes　the　cause　of　stream　error　generated　in　the　transmission　process　of　digital　television　programs,　presents　detection　methods　corresponding　to　different　error,　gives　block　diagram　of　the　monitoring　system,　as　well　as　the　design　concept　and　implementation　flow　of　transport　stream＇s　parameter　detection　module.　After　preliminary　verification,　it　achieves　a　good　result.