In modern surgical domain nearly exists no surgical forbidden zone, for damaged organs are capable of being incised or restored via operation. However, diseases may as well engender a long-term physical disorder, despite of a successful operation. If patients has been inflicted by dormant harm to functions of inward organs, they, under the affections out of subsequent operation and anesthetization, are likely to undergo a series of severe syndromes even life threats. So, cautious monitoring and remedying are indispensable. Then the commission befalls ICU. Professional ICU should be an absolutely independent room. Walls restricted to nurse adopt segregation of glassware or are equipped with circuit monitor. By patient-beds should be installed oxygen, negative-pressure air absorber, compressed air, etc. Besides, the room is to be fitted with some high-tech instruments. The principal guidelines of ICU are to afford heavily-stricken patients the even more effective medical service. Foundation of ICU drastically pushes ahead clinical practice and development related to mortal medics, and poses quite a few challenges to conventional management in hospital.