Concerning the characteristics of imperfect competition, we give a multiple-modeling for the firms in monopoly, oligopoly and monopolistic competition markets with the use of fuzzy relation equations and their solutions. 本文依据不完全竞争的特点,运用模糊关系方程及其解法,给出了厂商在垄断、寡头和垄断竞争市场中的综合决策模型。