This paper aims to meet the challenges that design faces in the intelligent era and explore the new design approaches that can deeply integrate human intelligence and machines. On a theoretical level, through the conceptual distinction between Artificial Intelligence and Augmented Intelligence from the dimensions of computing vision and activity types of intelligent systems. And then, the interpretation of the thinking activities and the making activities in the design is carried out. Finally, intelligent systems and design are combined to form the human-machine collaborative design based on Augmented Intelligence, and the role of human-machine collaborative design as co-creator and interlocutor is specifically analyzed. On a practical level, the features and functions of co-creators and interlocutors are explored and demonstrated through two different design practices. It can be concluded that human-machine collaborative design profoundly affects design at the level of tools and methods. The design tools based on the concept of Artificial Intelligence can improve design productivity and efficiency, while the design methods based on the concept of Augmented Intelligence can enhance the designer's synthesis and imagination, and form a new design thinking space and design creative results.