Abstract: To popularize the electronic let-off(ELO) and electronic take-up(ETU) control system on homemade loom and improve the quality of textiles,the article designed an ELO and ETU control system which can fulfill the required control function at a comparatively low cost.The system collects available signals of warp tension by choosing appropriate sampling time according to the loom′s axis angle,applies partial results of numeral proportional-integral-derivative(PID) control in programmable logic controller(PLC) software design by means of the built-in PID control function and the position function of PLC,and,coupled with AC servo system,accomplishes fast and accurate control of the rotating speed and direction of the servo electromotor,thus ensuring a uniform tension of the warps during weaving.The experiments of beating-up proved that the ELO and ETU control system runs stably and responds quickly,and that the warp tension is uniform and constant.