Yu, C.H. Bai, Y. Du, C.C. Duan, Z. Guo, Y.Y. Ji, D. Jiang, S.C. Jiao, Y. Peng, Y.M. Qin, Q. Sun, Y.S. Tian, S.K. Wang, J.Q. Wang, N. Wang, X. Wei, Y. Wen, Wen. Wu, J. Xing, Xing. Xu, Xu. Zhang, C. Zhang, Y. JACoW Publishing Geneva, Switzerland 978-3-95450-216-5 10.18429/JACoW-eeFACT2018-TUOBB04 English 79-81 TUOBB04 luminosity emittance lattice operation feedback Contribution to a conference proceedings 2019 2019-04 https://doi.org/10.18429/JACoW-eeFACT2018-TUOBB04 http://jacow.org/eefact2018/papers/tuobb04.pdf BEPCII is designed at the beam energy of 1.89 GeV. According to the requirements of high energy physics, BEPCII has been operated in the energy region from 1.0 GeV to 2.3 GeV since 2009. The energy region is quite large so that it is very important to select optics for the optimized luminosity. Different optics within different energy region at BEPCII will be introduced in detail in this paper.