Today’s business environment puts pressure on many high-technology companies to continuously improve the value of their products and services to remain competitive. Product-service system (PSS) is an emerging paradigm that enables a tighter integration between product and service offering. The research described in this paper aims to propose a new PSS design methodology based on the integrated product and service design requirements. The process consists of three stages: the identification of design requirements, the determination of design requirements rating and the integration of product and service design requirement in order to develop a PSS design concept. A case study of mobile phones design has been chosen to validate the proposed PSS design methodology.