Nii, K.N. Chouhan, V. Hayano, H. Ida, Y.I. Ishimi, K. Kato, S. Monjushiro, H. Saeki, T. Sawabe, M. Yamaguchi, T.Y. JACoW Geneva, Switzerland 978-3-95450-178-6 10.18429/JACoW-SRF2015-MOPB098 English 381-384 MOPB098 cavity experiment cathode controls SRF Contribution to a conference proceedings 2015 2015-12 http://dx.doi.org/10.18429/JACoW-SRF2015-MOPB098 http://srf2015.vrws.de/papers/mopb098.pdf Marui Galvanizing Co.,Ltd. has been developing Nb 9-cell SRF cavity vertical electro-polishing (VEP) facility and technique for mass production in collaboration with KEK. Our first 9-cell cavity VEP facility was not enough to control temperature during VEP, so the polishing quality was not so high. In this article, we will report the progress of temperature distribution and polishing quality due to the improvement of temperature control system of electrolyte and cavity during VEP.