
Background: preparedness faces an illness that will impact Extraordinary Events along with the elements as the cause by applying an epidemiological surveillance technology used in strengthening responsiveness to alertness, prevention efforts and outbreak control activities that are fast and precise. Aims: Implementation of Early Dengue Disease System in the work area of Dumai City Health Office. Methods: this study used a qualitative approach method with descriptive. Thirteen informants who voluntered to participate in this study. Data collection used the method of in-depth interviews. Data analysis used the following stages: data reduction, data presentation, evaluation, withdrawal conclusion. Results: the implementation of the DHF Early alertness System in the prevention and control of dengue disease found: data usage; periodic larvae check; disease daily census; monitoring or sanitation inspection; annual case monitoring. Conclusion: The implementation of the Early Alert System will be used as the basis for determining the policy of monitoring the local area which has the risk of dengue outbreak by carrying out epidemiological investigations and fogging.