Abstract:The Internet Era boosts birth to a new type of work —— home office. The combination of "home" and "office" not only improves labor productivity, but also challenges the current work-related injury system. In (2017) the supreme law article No. 6467, the space-time elements of traditional work-related injuries identification fail under the confusion of the functions of the workplace at home and office. Thus, how to accurately distinguish the "home state" from the "office state" becomes the key to the judgment of practicality. In the meantime, the "rule of increasing risk" of the current work-related injury system loses its applicable basis. Thus, how to judge the causal relationship of the cause in neutral risks and mixed risks becomes a difficult issue. To cope with the difficulties of work-related injury identification at home and to further improve the system of workrelated injury identification, therefore, it is urgent to analyze the criteria for identification of work-related injuries from the realistic challenges, to reconstruct new rules based on the two points of practicality and the cause, and to establish the Aggregate theory for identification of work-related injuries around the implementation and cause.