The work aims to propose a design process based on Kansei engineering, analytic hierarchy process and TRIZ theory on the basis of ensuring function, in order to meet people's perceptual needs and perception experience to the greatest extent and design the modular furniture that conforms to ergonomic principles and is beautiful, practical and easy to assemble and disassemble. Based on Kansei engineering method, the sample space of modular furniture was established and the perceptual image vocabulary was collected. The cluster of image vocabulary was analyzed and the average score of image vocabulary was calculated by means of semantic difference method for factor analysis. The hierarchical structure model of modular furniture design was constructed with analytic hierarchy process (AHP) and the weight results were calculated to determine the correlation between perceptual vocabulary and modular furniture design. Finally, the design practice was guided by the innovative concept of TRIZ. Through the integrated design model of Kansei engineering, AHP and TRIZ innovative concept, the design scheme that met the needs of users could be obtained. Based on Kansei engineering and AHP hierarchy analysis, the user needs are summarized, and the contradictions are analyzed and solved by TRIZ invention method, and finally the modular furniture is redesigned. The combination of the three can design and improve products in a more scientific and systematic way, and provide an effective reference for product design and development.