Generally divided into emergency EICU, surgical intensive care SICU, neurology NICU, neonatal NICU, pediatric care PICU, cardiac CCU Setting the number of beds is generally 5% of the total beds; should be set up to separate the different channels of human flow, logistics, to achieve the separation of patients from doctors and cleanliness and sewage diversion to minimize all kinds of interference and cross-infection. Reduce all kinds of interference and cross-infection; the overall layout of ICU should be divided into the medical area where the beds are placed, the medical auxiliary room area, the dirt treatment area, the medical staff living auxiliary room and other areas, clearly distinguish between the clean area, semi-clean area, contaminated area, and the areas are relatively independent of each other, with the same degree of cleanliness of the space centrally located in order to minimize the interference between each other, and to effectively control the occurrence of cross-infection. Unit composition: wards, clean and sterile wards, positive and negative pressure conversion rooms, central workstations, treatment rooms, treatment rooms, equipment rooms, dirty receiving and washing rooms, doctor's office, director's office, classroom, medical and nursing duty room, male and female locker rooms, staff restrooms, dining room, medical and nursing channel, patient channel, visiting channel, dirt channel, family waiting area, family conversation room, family lounge, etc.;