The principle of Humanity stands as a crucial principle in the application of international humanitarian law, particularly within the context of modern warfare. This research aims to discover the intricate connection between the existence of humanity principle in international humanitarian law and its implementation in modern war practice. It delves into the existing disparities and explores potential approaches to facilitate these gaps. The primary issues addressed in this thesis include: first, an examination of contemporary practices in modern warfare, and second, an analysis of the implementation of humanity principle in modern warfare from the perspective of international humanitarian law. This study employs a descriptive legal research method combined with data collection techniques through extensive literature reviews encompassing statutory research approaches, legal concept analyses, and scholarly works. The research findings reveal the existence of both efforts and challenges in implementing humanity principle in modern warfare. The presence of International Humanitarian Law (IHL) as a legal source and humanitarian organizations stands as a significant effort. However, the disregard and violation of humanity principle in modern warfare persist as enduring challenges. Based on the research analysis, the conclusion drawn is the continued need for a more comprehensive oversight in implementing humanity principle in modern warfare. The author proposes two suggestions: heightened attention from the international community towards overseeing the application of humanity principle in contemporary warfare practices and the necessity for further field studies to generate more comprehensive resolutions.