Method of monitoring enterprise false invoice through commodity composition and system thereof

The invention provides a method of monitoring an enterprise false invoice through commodity composition and a system thereof. The method comprises the following steps: input commodity data preparation is carried out, input data query is executed, taxpayers are grouped and calculated according to commodity names, and a composed input commodity data collection is obtained; output commodity data preparation is carried out, output data query is executed, taxpayers are grouped and calculated according to commodity names, and a composed output commodity data collection is obtained; in the obtained output commodity data collection, descending sorting is carried out according to the money sum proportion, calculation of the output commodity composition is carried out, and a main output commodity composition data collection is obtained; and names of commodities in the generated main output commodity composition data collection are sequentially taken out item by item for false issuing analysis. Enterprise false issuing invoice doubts are found, production and operation activities of the enterprise are monitored, normal production and operation of the enterprise are further regulated, and illegal and rule-breaking operation of the enterprise is avoided.