Transcranial electrical stimulation control method and control device

The invention relates to a transcranial electrical stimulation control method, a control device, a transcranial electrical stimulation device and a system. The transcranial electrical stimulation control method comprises the steps of acquiring a real-time electroencephalogram signal of a user acquired by an input electrode; determining a current sleep stage of the user according to the real-time electroencephalogram signal, wherein the sleep stage comprises an N1 stage, an N2 stage, an N3 stage, an N4 stage and an REM stage; judging whether the current sleep quality of the user is good or not according to the real-time electroencephalogram signal under the condition that the current sleep stage of the user is determined to be the N2 stage, the N3 stage or the N4 stage; and controlling an output electrode to output an electrical stimulation signal matched with the current sleep stage and the sleep period of the user under the condition that the current sleep quality of the user is determined to be poor. Accord