PURPOSE: To provide a data conversion device whose throughput is high without a redundant processing in the case of processing data.

CONSTITUTION: This data conversion device is provided with a data report generation means 4 for generating a report for indicating the conditions of object data and a starting means 5 for starting a second editing means 2 front a first editing means 1 in the first editing means 1, a data report analysis means 6 for analyzing the data report and a command string generation means 7 for generating a command string executable in the first editing means 1 from an analyzed result obtained from the data report analysis means 6 in the second editing means 2 and a command string execution means 8 for executing the generated command string in the first editing means 1.