Background: Surveillance system of infectious diseases and event is recognized as the cornerstone of public health decision-making and practice additionally the International Health Regulation requested counties to implement other type of surveillance to support the routine surveillance system and to increase the detection rate and sensitivity in reporting the diseases, event, or any public health emergency with international concern (PHEIC). The aim of this study was to assess the implementation level of community-based surveillance systems to ensuring that the system implemented efficiently and effectively. Methods: This was descriptive cross-sectional community-based study was conducted in Algableen locality White Nile states –from 2017 to 2020 involved 40 community volunteers to identify the effect of community – based surveillance in locality as initiative approach, Data was collected by using a per-prepared and pretested questionnaire followed WHO/EMRO tools for community volunteers at villages level felt through phone calls. Data were analyzed by using Statistical Packages for Social Sciences (SPSS) (version 20). Written and verbal consents were obtained from all participants as appropriate. Results: Community based surveillance started in 2016 endorsement and approval of guidelines Standard Operation Procedures (SOPs) and training materials has been developed in 2017, there were significant positive changes in implementation of this system the system was implemented in 17 states with percentage 94.4%, the evidence for this is the result revealed availability of guidelines and SOPs was 94.1% and 88.2%, completeness, and timeliness of system data was 94.1% the system database and shared the system finding with partners at state level were 70.6%. At community level the result revealed that the community volunteers had clear contribution in reporting the cases and event this support the indicator-based surveillance and increased the system sensitivity in the study area, 35% of them the report syndromic diseases, disaster, and animals’ deaths, 57% of them they report syndromic diseases and disaster, related to that, the result revealed97% of them they had the reporting format available and 75% reporting signal to locality level regularly. From the analysis of biological events the volunteer had report 54% of signal as diarrheal diseases and 81% of signal reported as flood from the natural events, also they are reported the increases of Mosquito in the study area. Conclusion: The study revealed significant positive impact when implementation of community-based surveillance system this system it helps in reflection of the epidemiological situation in the villages and locality, based on these finding the study recommended that, rapid and early response for the reported cases and rumors or any other event from the locality and state level reported by community volunteers, Regular refresh and basic training for community volunteers and secure the communication facilities and running cost.