Focusing on green infrastructure as a key factor in strategic planning can contribute to creating safer cities through several mechanisms, including the formation of safe public spaces, improving social cohesion and unity, as well as increasing resilience to natural disasters such as soil erosion and flooding. Green infrastructure in a city also contributes to promoting sustainability, efficient resource use, and is an important multifunctional element of the urban landscape, with significant importance in climate change adaptation. The emphasis of this paper is on examining the connections between ecological factors in urban areas on one hand and security on the other, as well as researching the strategy of 'green' planning using the example of Belgrade. The concept of 'green' planning is an increasingly used approach in development planning that plays a multifaceted role in creating safer cities that strive for sustainability. The aim of this paper is to identify the advantages and disadvantages of existing policies and practices in planning green infrastructure, which involves reviewing and analyzing all relevant strategic documents and plans related to Belgrade. Additionally, the goal of the paper is to propose specific measures to improve the strategy that would later contribute to improving the quality of life and security in urban areas. 'Green' planning requires collaboration of experts from different fields, i.e., an interdisciplinary approach to achieve a unified, holistic strategy. Through studying examples of good practice and analyzing relevant case studies from Belgrade, using geographic information system tools for spatial data and spatial relationship analysis, guidelines have been identified for more efficient management of green infrastructure systems, integration of ecological and security aspects into planning policies, as well as guidelines for using green infrastructure as an effective way to create healthier and safer cities.