Cognitive-behavioral therapy (CBT) is one of the most common and effective areas in modern psychology. Developed by Aaron Beck in the 1960s, CBT seeks to help people change their negative thoughts, emotions and behaviors by changing the way they perceive and interpret events. The core idea of ​​CBT is that our thoughts and interpretations determine our emotions and behavior. Often people interpret events in their lives negatively, which leads to emotional stress and poor health. CBT helps people pay attention to these negative thoughts and replace them with more rational and positive ones. One of the key principles of CBT is the idea of ​​relativity of thoughts. CBT states that our thoughts can be based on distortions and incorrect assumptions. For example, we may make catastrophic predictions about the future or overestimate the significance of a particular event. CBT helps people recognize these thinking distortions and develop healthier, more realistic views. Another important aspect of CBT is developing problem-solving and emotion management skills. CBT helps people develop strategies for effective communication, stress management and conflict resolution. CBT also teaches people to recognize and accept emotions without judging or putting pressure on themselves. During CBT, the psychologist works closely with the client to help them recognize and change negative thinking and behavior. The psychologist uses various methods such as observation diaries, role-playing games, exercises to develop new skills. The goal of CBT is to help the client become aware of his thoughts, emotions and behavior, and then establish new, more adaptive patterns. CBT has been proven to be effective in the treatment of a variety of psychological problems: depression, anxiety, phobias, panic disorders, post-traumatic stress disorder, addiction. CBT is also widely used for relapse prevention and mental health support. CBT is an effective and evidence-based branch of psychology that helps people change negative thoughts and behavior. Through its emphasis on re-evaluating thinking and developing new skills, CBT can significantly improve people's quality of life by enabling them to overcome psychological problems and find healthier ways of responding to events..