Background: The dengue Fever is the fastest emerging arboviral infection spread by Aedes mosquitos with superior in public health impact in over 100 tropical and sub-tropical in South East Asia, western Pacific and South and Central America. More up to 2.5 billion people globally lives under the threat of dengue fever and its severe forms dengue hemorrhagic fever (DHF) or dengue shock syndromes (DSS). More than 75% of these people, or approximately 1.8 billion, live in the Asia Pacific Region. As the diseases spreads to new geographical areas, the frequency of the outbreaks is increasing along with a changing disease epidemiology. It is estimated that 50 million people suffering of DHF required hospitalization each year, a must large proportion of whom (approximately 90%) are children less than five years old. About 2.5% of those affected with dengue die of the illness. Objective: The study to spread knowledge of present situation of dengue fever and dengue hemorrhagic fever and dengue fever shock syndrome this occurs in Timor-Leste in January 2020 until February 2022 by epidemiological approach. Research Design: The study adopted an analysis descriptive cross-sectional research based on data epidemiological health system information the Ministry of Health, Hospitals and Health Centers. Subject and sampling: The total number of study subjects was 506 (48 health professionals 1451 caregivers and their children under 5 years and 29 managers on health care settings). Setting: This investigation was carried out in the twenty-nine primary health settings affiliated in Health Municipality of Timor-Leste. Study tools: Three tools where use for data collection 1-Health professionals occupational and educational qualifications data assessment sheet. 2-Observation checklist of case management action. 3-Manager’s feedback self- administrate questionnaire. Results: Current results from died showed that 0.7% in 2020 and 1.3% actual 2022 and perception of new borne care suffering 3.8% for the dengue fever not mistake, that has good idea 96.2% he said understanding of DF, DHF and DSS. Recommendations: The research recommended that DF-DHF evaluation and supervision need more implementation in service training have been adequate the health professionals care and the participation of population cleanup home and environmental just more importance the people to understanding real situation process in current and future of Timor-Leste. Conclusions: The level of adherence of DF-DHF regarding children’s case management of dengue fever of DSS status was poor for closely partial of situation associated less than one one-fifth presented good level observance.