Robot-assisted the multi nozzle device and Nozzle less (free liquid surface) technology development are the innovative ways for the produce nano fiber. However those studies which use angled multi nozzle and electric field were not performed at all. Therefore, we developed new electro-spinning system that can move the position of the angled nozzle. And we compared simulation result and experimental results regarding the electric field between the nozzle and collector tips. Finally, interference of the electric field is the largest when the nozzle angles is 90°. And even if the robot is move between the nozzle and the collector the direction of the electric field was maintain steady state. Also, the results of experiment which measuring the change of the electric field in electro-spinning system by applying the noise filter were obtained similar results.