通过介绍控制科学早期及其诸多分支的发展历史，说明了控制科学是一门技术科学，它研究的内容应该是由需求推动的。然后，结合当前的工程需求提出了一些新的理论问题，其中包括解耦问题、冗余控制问题以及系统群的控制问题。

Based on a review about the historical development of control science, it is explained that control science ought to be a technical science, and is inspired by engineering applications. Then, several new theoretical topics including decoupled control, input redundancy, and multi-system control are presented to illustrate the demands generated from engineering.