Electroconvulsive shock is a more innovative treatment method that induces seizures as a therapeutic target through electric current. The best indications are as follows: 1, psychosis and depression, electroconvulsive therapy is more effective for the combined application of antipsychotic drugs than for antipsychotic drugs alone. Especially for depressive drugs and depressive symptoms, or the emergence of depressive malaise, serious mental disorders can be treated by electroconvulsive therapy. 2, for some patients with life-threatening or refusal to eat, self-destructive tendencies, can be treated by electroconvulsive therapy to get very good results. However, electroconvulsive therapy has no effect on mania, so the best indication for electroconvulsive therapy is depressive patients.