According to the Montreal Protocol, 1,1,1 TCE(1,1,1 trichloroethane), one of the ozone-depleting substances, will be prohibited to use as a metal cleaning solvent. The cleanliness test methods for measuring the cleaning performance were composed of the measurement of physical properties, the measurement of evaporation rate and nonvolatile residues, the experiments on material compatiblity between cleaning solvents and parts, and finally the experiments of removal efficiency. The physical properties and cleaning performances of 1,1,1 TCE were measured by the test method, and the resulting experimental data were compared with those of methylene chloride, one of the promising alternative metal cleaning solvents. The experimental results showed that the physical properties were similar and the removal efficiency of methylene chloride for removing a non-aqueous cutting oil was superior to that of 1,1,1 TCE, but the problems of relatively poor material compatibility from strong solvency and the toxicity remain to be solved for improvements.