In the course of building a rural new service system,the supply and marketing cooperation's function should be orientated in such four aspects as driving the farmer's specialized cooperation development,driving unity of specialized cooperation to form the industrial association(or the league),developing the rural synthetical service centre and village synthetical service cooperation,and extending to the area of agricultural product manufacture moderately.The supply and marketing cooperation's function scientifically,and to perfect a cooperation system is a key to make the cooperation-run enterprises devote into the agriculture stablely.