International completed optical/infrared telescopes were reviewed, and the construction of the next generation of telescopes was analyzed, including scientific purposes, optical structure, carry instruments, performance parameters and so on. This paper was focused on the summarization of optical design/diameter and site/orbit of next generation astronomical telescope. Their collaboration observation of ground-based/space-based, modular universal design, observation result big data sharing etc shows the technical characteristics and trend. Combining lessons from abroad with the reality of our country, our own advantages can be formed. Some thoughts and suggestions on long-term planning, private capital opening and others were put forward.