We tried to find in the base of structural analysis of agricultural system of chosen countries of EC (Belgium, Denmark, Germany, France, Holland) and Czech Republic the relationship between productive efficiency of these systems and their inside structure with using system methods by KUDRNA (1986). The agriculture of Belgium achieved the highest efficiency of the yields of dry matter of plants from ha agricultural area (100 %). then followed Germany (79,95 %) and France (73,35 %). Czech Republic was on the last place. The data were missing for expression of efficiency of agricultural systems of Denmark and Holland. The analysis confirmed the critical state of agricultural system of Czech Republic. The efficiency of Czech Republic is very low in the frame of comparison with evaluated countries. The low volume of active carbon and its deficit for current production of cereals is not very advantageous in the view of the next development of agricultural system. This state demands the responsible restructuring of Czech agriculture namely in the relation with its ability of competition in the period before and after entry to EC.