Abstract: This paper introduces the multichannel data collecting and processing svstcm applied to the IBM-PC computer and discusscsits working principle, main performance figures and functions, hardware structure and system soft ware. This system is noted for its multiple input channels (The number of channels can be chosen from 1 to 32),its changeable sampling frequencies (14 steps from 2Hz to 30kHz), great number of sampling dala (tp to a maximum of 10MB) and varied output forms. The system has a wide application in data collecting and processing, and measurement of analogs in dynamic processes,and has been successlul in measuring operating load ol equipments.