Abstract: Mental stress and mood disorders may be induced in some population when the emergent events of public health take place. Influence to control effectiveness and time course by factors of social and psychological aspects is marked out. Emotional disorders are often shown during the emergent events of public health, e.g., hypochondriac, panic, anxious, depressive and compulsive trouble. Appropriate countermeasures should be taken according to different population. Emergent events of public health provide a widely research stage and prospect.

Key words: emergent events of public health, severe acute respiratory syndrome, mood disorders, mental treatment