HMIS is a set of interrelated components that work together to collect, retrieve, process, store, disseminate and use healthcare information and knowledge to support healthcare system activities such as planning, control, and coordination (Lippeveld, 2000). A comprehensive healthcare system offers integrated healthcare services including curative care, rehabilitative care, disease prevention, and health promotion services. As a functional entity within the structure of such a system, the goal of HMIS is to generate relevant, quality information for these efforts so that healthcare system stakeholders use the information to make evidence-based decisions , transparent and rational and therefore interventions. HMIS components include data on events, routines, personnel and other resources to everything that supports and influences decision making, including data collection and compilation formats and records, stationery, information technology, infrastructure, procedures, meetings audit and policies. In short, it includes everything about what, where, when, who, why and how to collect, process, analyze, present, interpret and use health-related information. In addition to its importance for health management and service delivery, the integrated effort around HMIS also extends its benefits to program action, research and even influencing decision making (AbouZahr C, Adjei S, et al. (2007), an integral component of the healthcare system, the HMIS plays important supporting roles (Lippeveld and Sauerborn, 2000). , the main roles of HMIS can be discussed with respect to coverage, quality of healthcare services…… middle of paper……This model is a schematic way of looking at the number of data that needs to be collected at each level of the healthcare system The critical issue for this is determining what information is needed and at what level. Traditionally, requests for information have come from international agencies such as the WHO or from donor agencies that provide funding. Furthermore, to ensure that the same basic information is available from all facilities, a The national committee determines the essential data sets (EDS), “a set of minimum data necessary for the calculation of priority indicators” (Braa et al. , 2004, p. 350) which should be collected by all those who provide health services. Despite numerous requests for information, it is appropriate to precisely identify a selected number of essential data on the basis of which to calculate sensitive indicators to monitor progress.