The work aims to explore new product design methods from the perspective of new smart materials and guide designers to develop innovative smart products. The interaction design methods of smart products were analyzed by combining smart materials and emotional quantification. A framework of emotional interaction design method based on smart materials was proposed, and an emotional feature-smart material property-product state model was established. The specific operation steps and design thinking process of this method were expounded through case studies. The intelligent interactive gift box HeartBeat was produced under the guidance of this method, with main design objective of promoting emotional expression in intimate relationships. User tests of the product were conducted through questionnaires, and the design effect and the feasibility of this method were verified. In conclusion, this method serves as a complement and supplement to traditional emotional design methods, bringing different elements to intelligent product design from the perspectives of emotional measurement methods and new smart materials. It has great potential and research space in the field of intelligent product design, and has great significance in further theoretical and practical exploration.