Abstract: An interaction pattern based on gesture and sketch provides a natural and harmonious user interface for collaborative operation in conceptual design, which promotes the development and application of collaborative system. Based on the user- centered design, different conceptual design process is analyzed and the new col laborative design method based on gesture and sketch is given; a product informa tion carrier based on sketch is studied; Based on the gesture operation, the col laborative context-awareness and the description model are provided; the sketch interaction design for synchronous editing is analyzed and the bi-direct constra int solution is put forward. A convenient method of collaborative design is prov ided to develop design efficiency and improve human-computer interaction.