This paper applied ISO9001 standard to handtoolscompany to analyze the production situation, promote the suggestion of quality improvement, and evaluate the performance after introduced the ISO9001 to case company. In this research, three quality management tools are used.According to the analysis of production process and sampling testing, the current situation of case company is analyzed, and the key problems and its relative improvement suggestion is submitted to the case company. Investigation results show that the quality problems are solved and the performance of case company is better than before.