The invention provides a mobile target detection and track method of video detection, which comprises that first inputting video data, collecting sequential image in the video data, pretreating the image, checking the mobile target in the sequential image, reconstructing a background mode and extracting the mobile object, processing character extraction and character match on the mobile target, tracking the checked mobile target in the sequential image, outputting track result, to expresses motion process and predict motion tendency, at least according to the motion tendency and relative motion, judging if the detected mission occurs, when the mission occurs, reacting for the target motion to prompt about the abnormal target motion, and when the mission not occurs, going to track. The invention has accurate and reliable image check and track result on mobile target of video detection, to meet the detection demand of mobile target in supermarket or the like.