During the guidance process for patients with mild depression, cognitive behavioral therapy can be used. Cognitively speaking, the patient's low mood is caused by negative cognitions about themselves, the world, and the future, which we call the cognitive triad. They feel incompetent, worthless, and disliked in regards to themselves. They perceive the world as incapable or negative. Regarding the future, they feel unable to succeed and see themselves as failures, among other expressions. Therefore, the patient exhibits irrational and distorted cognitions. By observing these irrational cognitive patterns, we guide the patient to look for evidence, seek alternative explanations, make predictions, judgments, and responses, and resolve internal conflicts of thoughts through reality check methods, ultimately alleviating low moods. Additionally, behavioral methods, such as organizing a good life schedule and engaging in interesting activities, can also be used to enhance the patient's sense of pleasure and control, thereby improving their mood and ultimately achieving therapeutic effects.