Undergraduates cultivation of national defence spirit should be emphasized to establish their awareness that people should be vigilant in peace time and that forethought prevents calamity.

This paper introduces the concept of psychological defense into the study of defensive system of fort-type settlements.

Through an analysis of that the negative factors in culture at domestic and abroad impact on the Party conduct, this essay pointed out the choice to persist in the direction of advanced culture, construct the socialist culture with Chinese characteristics and build up the spiritual defense line for the construction of Party conduct.

Through the defensive characteristic analysis of Hunan province traditional villages in location selection,space pattern,fire prevention and architecture decoration,it is pointed out that the defensive concept of material defense and psychic defense in traditional villages is obviously advanced and scientific.