Detection of CD/EoR is one of the key science projects of SKA.  Essentially, there are three observational approaches to directly measuring the CD/EoR: (1) the spatially averaged global signature at each frequency, (2) the spatial fluctuations via statistical properties revealed by power spectra, and (3) tomographic imaging of the ionized structures.  Based on SKA pathfinders, such as 21CMA , MWA, we work on the data reduction pipelines, foregrounds subtraction methods, simulation, techniques, etc. We will improve our collaborations with international EoR science teams and prepare our research team for joining the future SKA key science project.