Variability is one of most important features of complexity in the complex systems because of itssensitivities to small perturbation. Various possible competing behaviors in the systems provide greatflexibility in controlling dynamical complexity and can manage/select a desired behavior for applicationsin real world. In many high-tech fields, how to control or manage complexity is of significant andchallenge issue. Taking as a typical example, accelerator driven clean nuclear power system (ADS) is one Variability is one of most important features of complexity in the complex systems because of itssensitivities to small perturbation. Various possible competing behaviors in the systems provide greatflexibility in controlling dynamical complexity and can manage / select a desired behavior for applicationsin real world. In many high- tech fields, how to control or manage complexity is of significant andchallenge issue. Taking as a typical example, accelerator driven clean nuclear power system (ADS) is one