OBJECTIVE To explore near 9-year monitoring of hospital environmental health study to analyze the results of conventional research and take corresponding measures to the problem.METHODS Hospital Infection Control Branch Department full-time staff and part-time nurses were monitored by conventional monitoring of environmental hygiene,the results of an analysis of seasonal climate for different environmental factors and air-conditioning.Corresponding measures,with particular emphasis on air conditioning filters clean and disinfect through the monitoring results of 4000 cases for the control group and experimental group were compared at the same period a year.RESULTS Take appropriate measures before and after the monitoring results of environmental health science and the infection rate appeared too high a failure rate of 3-10 in the month of the month especially,the use of the control group occurred in a failure rate of 1.5%,Test group to adopt corresponding measures after the failure rate of 0.7%,2000-2008 can be seen from Table 1 the incidence of hospital infection in three hours before the measures taken before and after the distribution of differences(P