This research aims to develop a digital logbook system that can improve data management among fishermen who catch marine ornamental fish. The digital logbook system can assist fishermen in recording and managing data on marine ornamental fishing activities, including location, volume and type of catch, as well as educational data on marine ornamental fish species provided through this system. The research method uses the Agile Development approach and system testing using the UTAUT method questionnaire to evaluate various aspects such as usability, convenience, social influence, design, facilities, and behavioral intentions. The questionnaire was distributed to fishermen and government users with a total of 30 respondents. Based on the results of the respondents, the average score is 82%, which indicates that this system is feasible to implement and develop. The implementation of this digital logbook system is expected to improve the efficiency of fisher data management, allowing for more accurate analysis of fishing trends and supporting the conservation of marine ornamental fish. These findings indicate that the digital logbook system can be a tool that can improve fisher data management and help the government to monitor and evaluate the management of marine resource conservation in Indonesia, especially in South Sulawesi waters.