It is a social system engineering to solve problems of city agricultural laborers, inevitably concing series of social phenomenon and the social issues of the city and countryside relations, the govment function, the city management, the fair efficiency, the population flows, the labor employment, the social security, and so on. Furthermore, it also involves the profoundly political and economic system reforms, the transformation of govment functions, the system perfection, legal administration, the social stability in China. The city govment, as the direct superintendent of the agricultural laborers, should adopt the conception of the system engineering to construct anew mechanism of the city agricultural laborers socialization standard management, which has a profound theoretical and practical significance.