Abstract: Academician Gu Dezhen was a well-known engineering geologist,also Chinese engineering geological founder. He was well-regarded,excellence academic,modes,sincere and had the spirit of courage to bear. He had shown the utmost solicitude,and had paid more attention to the training and teaching,and is an example for young people. He was the director of the 1st engineering geological professional committee of the Geological Society of China. Under his leadership,the engineering geology had been developing rapidly. Especially,he founded the rock mass structure control theory,which promoted the development of Chinese engineering geology in 20 Century. This theory had made some important contributions to the development of engineering and construction in China. Rock mass structure control theory had grown into a big tree,had formed many branches,such as the rock mass structure classification,rock mass structure mechanics,engineering geological mechanics,inverse analysis method,et al. Nanjing University preferred plane group have studied his structure control theory,and had proposed the preferred plane theory for the efforts of 30 years. A new research method and direction of the preferred plane theory have been formed,and is a branch of structural control theory. In the 21 century,on base of the academic though of the structure control theory,the internal relationship between nature laws to macro and more micro laws for engineering geology will be explored by the methods of nano-geology and nanotechnology. Researchers should pay attention to the problem of disasters chain,the disaster types and disaster mechanism in the study of prevention and prediction of geological disasters,and give countermeasures of controlling geological disasters. At the same time,the research of information systems of decision,management and prevention of disaster should be strengthened. This year is the 100 anniversary of the birth of Academician Gu Dezhen. Writing this paper will offer the feeling of our thoughts and admiration to Academician Gu Dezhen.