Emotions affect people’s personality development, their perception and evaluation of self, and also affect their level of cognitive thinking, hindering normal thinking and learning. Emotions affect the immunity of the organism, emotions can treat and cause diseases, emotions can change endocrine and nervous system functions and affect mental health. The main effects of emotions on mental health are: 1. Emotions can affect the development of people’s personality. People who live under depression, melancholy or fear for a long time have an odd personality, poor ability to interact with people and are unpopular. 2, emotions will affect people’s perception and evaluation of self. When people are in a negative mood, they will lower their evaluation of themselves and make such attributions as “I always fail” and “I am incapable”. 3, emotions can affect people’s cognitive thinking level, hindering normal thinking and learning, tension, fear, irritability will hinder the speed of problem solving, optimistic and calm emotions help calm thinking. Anxiety and tension are not only properly regulated, but also form “learned helplessness”, which causes a problem that “always” cannot be solved. Emotions on physical health are: 1. Emotions affect the body’s immunity, modern medicine believes that good emotions can make the body’s physiological functions in the best state, so that the immune anti-disease system to play the maximum effect, to resist the attack of disease. Many medical doctors believe that the body itself is a good doctor, 85% of the disease can be self-control. Therefore, some psychologists refer to emotions as “life’s baton”, “health of the summer and winter table”. 2, emotions can cure or cause disease, psychologists found that: people in the excitement of the skin will be flushed and hot, in tension or anger, the skin will be pale and cold. If a person’s emotions change dramatically, it can also lead to skin irritation, and can even affect the hair as a result. At the same time, happy and joyful and other correct emotions can make the wound heal faster and promote the healing of diseases. 3, emotions can change the endocrine and nervous system function, affecting mental health, often stressful and busy, discontent will make the body appear insomnia, hair loss, and even neurasthenia and other symptoms of system disorders. If a strong, sudden or persistent mental shock can cause mental disorders. Summarize the role of emotions on physical and mental health with an old saying: “Anger is gas up, happiness is gas slow, sadness is gas down, fear is gas down, shock is gas chaos, labor is gas depletion, thinking is gas knot.” Emotions have a great impact on health.