Emotional intelligence is an important psychological construct that reflects an individual’s ability to recognize, evaluate, and consciously regulate their own emotions, as well as to understand the feelings of others and respond appropriately. In modern psychology, emotional intelligence is considered not only a tool for controlling personal emotional states, but also a key factor directly related to social adaptation, effective communication, resilience to stress, and overall quality of life. Research shows that individuals with high levels of emotional intelligence demonstrate greater psychological stability, are more capable of managing negative emotions constructively, and exhibit empathy and understanding in interpersonal relationships. Furthermore, emotional intelligence plays a significant role in professional life, particularly in leadership abilities, teamwork, and achieving career success. This article analyzes the theoretical foundations of emotional intelligence, its main components, psychological mechanisms, and its importance in mental health and social life from a scientific perspective. In addition, the psychological aspects of developing emotional intelligence and its impact on personal growth are discussed.