This study aims to suggest a new approach to economic valuation of the special library, in response to the necessity of economic justification of the special library operated by firms and research institutes. Benefit measurement elements and analysis methods to be used in the study were derived through feasibility evaluation on models in previous studies, and objectivity and applicability were the criteria for feasibility evaluation. Depending on which type of resources are used in providing service, different benefit measurement elements and methods were applied. Based on this, calculation formula for service valuation of special library was presented. The development of analysis model for economic valuation of special library made it possible to objectively prove the value of the special library, and is considered to provide an opportunity to publicize the real value of the special library.