For the problem of employee performance evaluation model, in which the index evaluation values are linguistic variables, a multiple attribute decision making method named relative ratio method is proposed based on triangular fuzzy numbers. First, the linguistic variables are transferred into triangular fuzzy numbers and to obtain the criteria weight, the triangular fuzzy number decision matrix is firstly defused into a crisp number decision matrix. Then the variation coefficient method is used to determine the evaluation criteria weight. Finally, based on the concept of relative ratio method, relative approach degree is induced for sorting and merit of employees' performance. At the end of the study, an example is given to illustrate the feasibility and effectiveness of the proposed method.