Abstract: Reactor is a complicated system process. It is a device which is coupled by multiple physical processes such as the neutron field, the temperature field, the flow field, the stress field and the chemical field. The physical process involves multi-size reaction mechanism from microcosmic nuclear reaction to macroscopic energy release. With arrival of Exascale (1000PFLOPS) computing era, the total development tendency of nuclear energy is being changed from engineer driving toward to the first place of numerical simulation. At present, the more small size and more precision are approaching in the designs of four general reactors. The numerical simulation of high fidelity is being taken more and more important roles in promotion of nuclear devices property and reduce rich quantity etc. However, the coding wall and property wall exist between hardware and software from beginning to end. On the other hand, the lower efficiency of flops operation, long time of transplanting, poor schema in common use and difficulty extension in scale also exist for a long time. A available method urgently needs to research for above problems. In this paper, our understanding for NEAMS, CASL and ECP from American were given. Then a path of integrating generality and developing individuality based on the research experiment of numerical reactor key technology was recommend. An idea of software development based on the parallel frameworks was also put forwarded. The goal is to realize the detail modeling and coupled computation of multi-physics, multi-dimension and multi-process of numerical reactor in Chinese superpower computers. We think this is a shortcut for improvement of CAE software level of our country. Maybe this suggestion does not mature, it is only for discussion in industry.