The aim of this study is to evaluate and rank factors of intellectual capital that aims to improve the performance of corporation. After designing and distributing questionnaires among coil industry experts, priority and importance of each of these factors with using Fuzzy TOPSIS, FAHP, vikor, ELECTRE were evaluated. According to the results of the above methods in cases not compatible with each other, to achieve the overall ranking of integration methods have been used. The results obtained, according to the company's performance improvement indicate that the net profit is the most important; competitive advantages, customer retention, market value of the company; innovation capacity and volume of transaction are at ranking highest respectively. Based on integration method is most important factors of intellectual capital in order of importance include: Human capital, Structural Capital, Relational Capital, Innovation Capital, Customer Capital factors and also, the most important factors of Human capital, Structural Capital, Relational Capital, Innovation Capital, Customer Capital regarding to company performance improvement in order of importance Include: Leadership ability, Employees’ competence, Employees’ experience, Employees’ creativity, Individual-level knowledge, Customer satisfaction, Motivation of the personnel, Customer loyalty, Employees’ attitude, Organizational structure, Staff’ s experience, Organizational learning, Marketing capability, Databases, Management system, Use of knowledge, Strategically values, Operation process, Information system, Corporate culture, Brand value, Mission-vision, Relationship with suppliers and competitors, Size of organization, Innovation culture, Relationship with other organization, Market intensity, Company lifecycle, Customer appropriateness, Innovation mechanism and Innovation achievements.