Abstract:In the past, the research on service quality was mainly focused on the single mode of single industry, and the service quality model was poor universality and lack of intuitive presentation of customer perception. The current market complexity increases, and many service industries have both B2C and B2B business models. In order to enhance the applicability of the service quality evaluation model, this article embarks from the perspective of customer perception, using 3d service contact unit technology to build B2C and B2B service quality assessment model respectively. Then through comparative study, analyze the difference of service quality in two modes. The indicator difference of service quality under two modes is analyzed to clarify the strategy of service quality improvement in different modes. This paper provide theoretical and practical reference for the service quality assessment model construction and service quality improvement.