The purpose of this study is to develope the model of economy analysis and evaluation to justify the effect of economic feasibility for constructing ERP system in the company. Since the results for the evaluation of alternatives are influenced by the nature of capital and the circumstances, it is very difficult to evaluate the alternatives and it takes too much time to apply it in the field on account of many alternatives. This study suggests establishment and application of the model on economic analysis and evaluation regarding the nature of capital by using excel spread sheets.