1. A method for systematic evaluation and rating of technical equipment using a data processing device, which works together with at least one data memory and has an input and display device, wherein, step-by-step: at least one first data set having economically relevant input parameters and at least one second data set having technically relevant input parameters are detected and/or established for the particular technical equipment, for each data set, through knowledge-based predetermined numerical and/or logical linkages and knowledge-based predetermined weighting factors specific to the equipment, the established input parameters are brought together into an economic evaluation parameter FIx and a technical evaluation parameter RIx, respectively, and from the established evaluation parameters, through knowledge-based predetermined numerical linkages and weighting factors, a single overall resulting evaluation parameter EIx for validating the particular technical equipment is determined.