Wang, H.B. Bussmann, M.H. Hai, B. Huang, Z. Li, J. Li, X.N. Ma, X. Mao, L.J. Mao, R.S. Wen, W.Q. Winters, D.F.A. Wu, J.X. Yang, J.C. Yuan, Y.J. Zhang, D. Zhao, D. JACoW Geneva, Switzerland Laser cooling is one of the most promising techniques to achieve high phase-space densities or even crystalline beams for relativistic heavy ion beams at storage rings [*]. In addition, precision laser spectroscopy of relevant transitions in highly charged ions can also be performed simultaneously during the laser cooling experiments [**]. In the storage ring CSRe at IMP, a new laser cooling experiment for Li-like ¹⁶O⁵⁺ ion beams is currently being prepared and will be carried out at the end of the year 2017 under the Laser-cooling Collaboration. During the experiment, a CW laser with a wavelength of 220 nm will be used to cool the ¹⁶O⁵⁺ ion beams with an energy of 280 MeV/u. The ¹⁶O⁵⁺ ion beams will be the highest charge state and highest energy ions ever used for laser cooling at the storage rings. In the experiment, the longitudinally dynamics of ultra-cold ion beams will be investigate systematically towards the transition of the space charge dominated regime. Precision laser spectroscopy of ¹⁶O⁵⁺ ions for measuring the transition energy of 2s1/2'2p1/2 and 2s1/2'2p3/2 is foreseen.