1. A computerized system, comprising: one or more processors; and a memory storing one or more programs for execution by the one or more processors, the one or more programs including: a dividing unit operable that divides a video into a plurality of segments; a feature extracting module that extracts a set of features of each segment, wherein the set of features comprises a color variable feature, a movement variable feature and a background variable feature; and a calculating module that calculates a set of factors of each segment according to the set of features of each segment, calculates an abnormal value of each segment based on the set of factors of each segment, and determines one or more abnormal segments of the video according to the abnormal value of each segment.