Cognitive-behavioral therapy is an evidence-based psychological approach to reducing symptoms of anxiety and depression in children, which focuses on the interaction between thoughts, emotions, behaviors, and environmental experiences. Anxiety and depression in childhood are important mental health problems that can affect cognitive development, emotion regulation, social relationships, academic performance, and quality of life. Although fear, worry, sadness, and negative emotional reactions are normal at some stage of development, the persistence, intensity, and frequency of these symptoms, especially when accompanied by a decline in daily functioning, necessitate professional evaluation. The importance of cognitive-behavioral therapy in this regard is related to its ability to identify and modify dysfunctional thought patterns, reduce avoidance behaviors, strengthen coping skills, and increase the child's sense of self-efficacy. This approach is based on the principle that the child's perception of events, his assessment of his personal abilities, and the way he responds behaviorally to stressful situations can play a role in the persistence of emotional symptoms. For example, a child who sees mistakes in doing homework as a sign of his or her inability may gradually experience feelings of worthlessness, frustration, and fear of failure, and a child who considers social situations dangerous may avoid connecting with peers and thus miss the opportunity to gain positive social experiences. In cognitive-behavioral therapy, such patterns are examined in accordance with the child's age, level of cognitive development, and language ability, and the therapist helps him or her distinguish between observable realities, subjective perceptions, and negative predictions. One of the main components of this treatment is the training to identify automatic thoughts, which sometimes form quickly and without conscious consideration in the child's mind and can increase the intensity of negative emotions. The child gradually learns to identify thoughts such as "I can't," "Everybody makes fun of me," or "something bad is bound to happen," examine the evidence for and against them, and make more realistic interpretations. The goal of this process is not to forcibly replace negative thoughts with positive statements, but rather to develop cognitive flexibility and increase the child's ability to evaluate situations in a balanced manner. In the area of anxiety, gradual exposure to fearful situations is an important component of cognitive-behavioral therapy. Children who avoid school, separation from parents, responding in class, interacting with peers, or unfamiliar situations may feel relaxed by avoiding these situations in the short term; however, persistent avoidance can maintain fear and reduce the opportunity to learn coping skills. In exposure therapy, difficult situations are divided into smaller stages based on a clinical assessment and with the participation of the child and the family so that the child can gradually attend to and experience anxiety-inducing situations that he is able to manage his discomfort. This process should not be carried out in the form of compulsion, humiliation, or sudden exposure to intense fear, but should be safe, staged, and appropriate to the child's developmental needs. In children with depressive symptoms, cognitive behavioral therapy, in addition to correcting negative thoughts, focuses on increasing pleasurable activities, strengthening social connections, and reducing behavioral withdrawal. Decreased activity, social isolation, and loss of interest in play or interacting with others can limit the opportunity to experience positive reinforcement, creating a cycle of sadness, lack of motivation, and decreased engagement. Scheduling daily activities, setting small, achievable goals, encouraging gradual participation in activities tailored to the child's interests, and recording mood changes can help break this cycle. Also, problem-solving training helps a child break down complex issues into manageable steps, explore different solutions, and weigh the potential consequences of their choices. This skill is especially important for children who quickly feel helpless in the face of failure, peer conflict, or academic pressure. Emotion regulation is also one of the main areas of therapy. In therapy sessions, the child can practice naming emotions, recognizing physical signs of anxiety, identifying emotional stimuli, using slow breathing, and employing adaptive coping strategies. These trainings help the child better understand their emotions and choose more targeted responses rather than impulsive reactions or long-term avoidance. However, the goal of therapy is not to completely eliminate sadness, fear, or worry, as these emotions are a natural part of life; the main goal is to reduce the severity and disorder caused by symptoms and increase the child's ability to manage them adaptively. The effectiveness of cognitive-behavioral therapy in children depends on a variety of factors, including the type and severity of symptoms, the child's age, the presence of co-occurring problems, the quality of the therapeutic relationship, the level of family involvement, and the persistence of exercises. In younger children, the use of targeted play therapy, stories, drawings, emotional images, dolls, and dramatic situations can make cognitive and behavioral concepts more understandable. In older children, cognitive dialogue, recording thoughts, practicing problem-solving, and examining evidence can contribute more to the healing process. Parental involvement is also of fundamental importance in many cases, as caregivers' everyday behaviors can increase the opportunity to practice new skills or inadvertently reinforce avoidance patterns. Parent education should focus on empathetic accountability, encouraging the child's effort, reducing criticism and blaming, avoiding excessive reassurance, and providing the opportunity for age-appropriate independence. Cooperation with the school can also be effective in identifying stressors, adjusting educational supports, and providing the opportunity for the child's gradual participation in classroom activities. In order to scientifically evaluate the effectiveness of treatment, it is necessary to systematically investigate the changes in anxiety and depression symptoms before, during and after the intervention. The use of age- and culture-appropriate standard tools, child reporting, parental information, and assessment of academic and social performance can provide a more comprehensive picture of the results. Reducing the questionnaire score alone is not enough, and it is better to consider changes in quality of life, avoidance, ability to regulate emotion, social relationships, and return to normal activities. In addition, it is important to assess the stability of the results in subsequent follow-ups, as short-term improvement does not necessarily mean complete resolution of symptoms or definitive prevention of recurrence. Limitations to the application of cognitive-behavioral therapy include difficulty expressing thoughts in young children, early resistance to exposure, persistent family problems, limited access to trained therapists, and the presence of co-occurring disorders. Also, not all children respond equally, and some may require a longer treatment plan, more specialized interventions, or a combination of multiple approaches. In cases where there are symptoms of severe depression, self-injurious thoughts, serious loss of function, or risk to the child's safety, an immediate professional evaluation is necessary, and the treatment plan should be adjusted based on the level of risk and clinical needs. In some severe cases, the medical professional may also consider pharmacological treatment alongside psychological interventions. Overall, cognitive-behavioural therapy can help reduce symptoms of anxiety and depression in many children by targeting dysfunctional thoughts, avoidance behaviours, reducing mood-enhancing activities, and impairing coping skills. However, its effectiveness should be assessed in the context of individual assessment, appropriateness of the intervention to developmental stage, family collaboration, and continuous assessment of outcomes. An approach that considers the child not just as a set of symptoms, but as a growing individual with different emotional, cognitive, and social needs, can provide the ground for more sustainable improvement of performance, increased sense of empowerment, and promotion of mental health.