First, the thesis makes an objective survey of the inclination of schools excessive safety management, thinks the problems caused by this inclination deeply, then puts forward the moderation principle which should be established in schools safety management and constructs this principle from four aspects.

Cultural empathy should observe the moderate principle which means neither underempathizing nor overempathizing.

Around the problem of the cracks shown on the outside thermal insulating layer of the outside wall,this essay is putting forward the controlling principle of the cracks control of the outside thermal insulating layer of the outside wall with "the progressive and soft release stress layer for layer "by the analysis from such aspects as the structure,materials and construction.