Abstract: To make the production and management of slubby yarn more convenient,based on the current single control unit,a network monitoring system for slubby yarn production is designed by making use of computer technology and serial linking communication technique in which the slubby yarn production machine is connected with a network RS-422 and a host computer is used to supervise and control the production process.The computer can simultaneously control multiple spinning frames,and the production process parameters can be seen on the screen and modified at real-time according to the actual needs for different varieties.The paper introduces the design concept of the system,adoption of technology,data collection,execution of communication along with the hardware components and software design.