Hospital Waste material generation is an undesired process in a hospital service rendering system. Infectious Wastes due to their hazardous nature which containing Pathogenic Micro Organisms could harm and contaminate human environment in comparison to other waste materials. For this reason, it is necessary to adopt relevant alternatives and mechanisms to curb and disinfect them. The research Purpose is to measure the quality of effectiveness of Tehran's hospitals environment management based on ISO 14000.To conduct the research, applied, descriptive and field methods are used. A total of 75 Tehran's hospital are selected from among them 60 hospitals are chosen based on Krejciey and Morgan tables as a sample by random. Date collected through questionnaires and by using likert's six-option spectrum based on the said standard and data are analyzed by SPSS software and by using descriptive and inferential statistics (T test).The average scores of researched variables (are the same components of standard) are, Policies3/48, identification of environmental aspects3/15 , formulation of Micro and Macro objectives3/15, Planning for achieving objectives3/15, development of duties and responsibilities3/18 , staff training3/23, communication system3/37, documentation of ٍٍٍٍEnvironment Management System3/22, monitoring operations3/24, reaction readiness in emergencies3/25, periodic appraisal3/09, corrective actions as well as revision of environment management system3/02. The average of all variables are lower than test value(3/5) and undesirable. Thus, it requires further consideration and improvement.