With the complication of great pattern design

the speciality of designer

the dispersal of design location and the integration of computer networking computing

It is necessary and possible to develop computer supported pattern design system. This paper applies CSCW technology in the field of computer art and construct cooperative pattern design model. It focuses on the cooperative pattern design and analyze modes of the cooperative design

the structure

the relative management and control. Firstly

it presents the basic process of pattern design system

analyzes the basic requirement of computer supported multi user pattern design

describes the interactive mode and cooperative mechanism of multi designer

whose tasks are dispersed in temporal and space

and are dependent on each other. It defines the elements in a cooperative pattern design system and builds up a logical model of pattern design system. It studies not only the pattern management model and concurrent control of multi designers

but also presents design conference management model

the synchronous conference model

message management policies model in a pattern design system. Finally

it gives the structure model of pattern design system.