Abstract: This paper discusses some important methodological problems in thephysiopsychological investigation of the bioelectrical activities of the brain.A practical microcomputer processing system of the bioelectrical signalsof the brain (PSBSB) was established and used to analyse EEG andEPs (including ERPs) in aphysiopsychological or neurophysiological labora-tory. It can also be turned into a routine detecting system. It not onlyincludes most of the current methods used in this field but also haspowerful processing ability and a great capacity for handling data. Its proce-ssing speed meets all ordinary requirements. In some aspects, its functionsare close to or even surpass those of some ordinary minicomputers and spe-cial purpose computers, especially in secondary processing ability, functio-nal flexibility, expansibility of software and hardware, and populariza-tion. it is more suitable for physiopsychological investigation.

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